diff --git a/background.js b/background.js
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+++ b/background.js
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+chrome.webRequest.onErrorOccurred.addListener(
+  function(details) {
+    if (details.type === "main_frame") {
+      chrome.tabs.update(details.tabId, {url: chrome.runtime.getURL("index.html")});
+    }
+  },
+  {urls: ["<all_urls>"]}
+);
\ No newline at end of file
diff --git a/css/style.css b/css/style.css
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--- /dev/null
+++ b/css/style.css
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+@font-face {
+  font-family: SuperMario256;
+  src: url('../fonts/SuperMario256.ttf');
+}
+
+body {
+  position: relative;
+  height: 100vh;
+  width: 100vw;
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+  background-color: #DFDFDF;
+  color: #21242B;
+}
+
+@media (prefers-color-scheme: dark) {
+  body {
+    background-color: #21242B;
+    color: #DFDFDF;
+  }
+
+  .creator-details a {
+    text-decoration: underline;
+    font-style: italic;
+    color: #FFFFFF !important;
+  }
+}
+
+.start-screen {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  width: 1280px;
+  height: 530px;
+  margin: 0 auto;
+  border: none;
+  background: url('../images/start-screen.png');
+}
+
+.main-wrapper {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+}
+
+.game-screen {
+  position: relative;
+  width: auto;
+  height: 100%;
+  border: none;
+  background: url('../images/bg.png');
+  display: none;
+  margin: 0 auto;
+}
+
+.creator-details {
+  position: absolute;
+  bottom: 0px;
+  left: 0px;
+  font-size: 16px;
+  line-height: 12px;
+  padding-left: 5vw;
+  margin: 0;
+}
+
+.creator-details a {
+  text-decoration: underline;
+  font-style: italic;
+  color: #000000;
+}
+
+.score-wrapper {
+  padding-left: 40px;
+  width: 1240px;
+  margin: 0 auto;
+  height: 50px;
+  display: none;
+  border: none;
+  line-height: 50px;
+  font-size: 20px;
+  background-color: #ADD1F3;
+  font-family: SuperMario256;
+  color: #FFFFFF;
+}
+
+.life-count {
+  background: url('../images/mario-head.png') left center no-repeat;
+  width: 100px;
+  float: left;
+  padding-left: 40px;
+}
+
+.coin-score {
+  background: url('../images/coin.png') left center no-repeat;
+  width: 150px;
+  float: left;
+  padding-left: 40px;
+}
+
+.level-num {
+  width: 150px;
+  float: left;
+}
+
+.total-score {
+  float: left;
+}
+
+.start-btn {
+  width: 200px;
+  height: 50px;
+  color: #FFFFFF;
+  background: url('../images/start-btn.png');
+  position: absolute;
+  bottom: 100px;
+  left: 252px;
+  border: 2px solid #000000;
+}
+
+.back-btn {
+  position: absolute;
+  top: -10px;
+  right: -10px;
+  width: 200px;
+  height: 50px;
+  background: url('../images/back-btn.png');
+  color: #FFFFFF;
+  border: 2px solid black;
+  margin: 10px;
+  display: none;
+}
+
+.loading-percentage {
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  transform: translate(-50%, -50%);
+  font-size: 60px;
+  font-family: SuperMario256;
+  text-align: center;
+  padding: 100px;
+  color: #FFFFFF;
+}
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diff --git a/index.html b/index.html
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index 0000000..341b3ee
--- /dev/null
+++ b/index.html
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+<!DOCTYPE html>
+<html>
+
+<head>
+  <meta name="viewport" content="width=1280" />
+  <title>Mario Game | Chrome Extension</title>
+  <link rel="stylesheet" type="text/css" href="css/style.css">
+</head>
+
+<body>
+
+  <!-- main game -->
+  <div class="main-wrapper">
+    <canvas class="game-screen"></canvas>
+  </div>
+  <div class="creator-details">
+    <p>Developed by <a target="_blank" href="https://github.com/sohamgoswami07">Soham Goswami</a></p>
+    <p>Mario game code taken from <a target="_blank" href="https://varunbanka.github.io/">Varun Banka</a> | <a href="https://github.com/VarunBanka">Github</a></p>
+  </div>
+
+  <script src="js/View.js"></script>
+  <script src="js/GameUI.js"></script>
+
+  <script src="js/mainGame/GameSound.js"></script>
+  <script src="js/mainGame/Element.js"></script>
+  <script src="js/mainGame/PowerUp.js"></script>
+  <script src="js/mainGame/Enemy.js"></script>
+  <script src="js/mainGame/Bullet.js"></script>
+  <script src="js/mainGame/Mario.js"></script>
+  <script src="js/mainGame/Score.js"></script>
+  <script src="js/mainGame/MarioGame.js"></script>
+
+  <script src="js/MarioMaker.js"></script>
+  <script src="js/Preloader.js"></script>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/js/GameUI.js b/js/GameUI.js
new file mode 100644
index 0000000..ab295b3
--- /dev/null
+++ b/js/GameUI.js
@@ -0,0 +1,72 @@
+//canvas elements for the main mario game
+
+let GameUI = (function() {
+let instance;
+
+  function GameUI() {
+    let canvas = document.getElementsByClassName('game-screen')[0];
+    let ctx = canvas.getContext('2d');
+    
+    this.setWidth = function(width) {
+      canvas.width = width;
+    };
+
+    this.setHeight = function(height) {
+      canvas.height = height;
+    };
+
+    this.getWidth = function() {
+      return canvas.width;
+    };
+
+    this.getHeight = function() {
+      return canvas.height;
+    };
+
+    this.getCanvas = function() {
+      return canvas;
+    };
+
+    this.show = function() {
+      canvas.style.display = 'block';
+    };
+
+    this.hide = function() {
+      canvas.style.display = 'none';
+    };
+
+    this.clear = function(x, y, width, height) {
+      ctx.clearRect(x, y, width, height);
+    };
+
+    this.scrollWindow = function(x, y) {
+      ctx.translate(x, y);
+    };
+
+    this.draw = function(image, sx, sy, width, height, x, y, width, height) {
+      ctx.drawImage(image, sx, sy, width, height, x, y, width, height);
+    };
+
+    this.makeBox = function(x, y, width, height) {
+      ctx.rect(x, y, width, height);
+      ctx.fillStyle = 'black';
+      ctx.fill();
+    };
+
+    this.writeText = function(text, x, y) {
+      ctx.font = '20px SuperMario256';
+      ctx.fillStyle = 'white';
+      ctx.fillText(text, x, y);
+    };
+  }
+
+  return {
+    getInstance: function() {
+      if (instance == null) {
+        instance = new GameUI();
+      }
+
+      return instance;
+    }
+  };
+})();
diff --git a/js/MarioMaker.js b/js/MarioMaker.js
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index 0000000..3ac5da0
--- /dev/null
+++ b/js/MarioMaker.js
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+//Main Class through which both the game and level editor are instantiated
+let MarioMaker = (function() {
+  let instance;
+
+  function MarioMaker() {
+    let view = View.getInstance();
+
+    //instances
+    let marioGame;
+    let mainWrapper;
+    let startScreen;
+    let btnWrapper;
+    let startGameButton;
+    let backToMenuBtn;
+
+    let that = this;
+
+    this.init = function() {
+      marioGame = new MarioGame()
+
+      //main menu screen
+      mainWrapper = view.getMainWrapper();
+      startScreen = view.create('div');
+      btnWrapper = view.create('div')
+      startGameButton = view.create('button');
+      backToMenuBtn = view.create('button');
+
+      view.addClass(btnWrapper, 'btn-wrapper');
+      view.addClass(startScreen, 'start-screen')
+      view.addClass(startGameButton, 'start-btn');
+      view.addClass(backToMenuBtn, 'back-btn');
+      view.append(startScreen, startGameButton)
+      view.append(btnWrapper, backToMenuBtn);
+      view.append(mainWrapper, startScreen);
+      view.append(mainWrapper, btnWrapper);
+
+      backToMenuBtn.onclick = that.backToMenu;
+
+      startGameButton.onclick = function() {
+        map = that.loadMainGameMap();
+        that.startGame(map);
+      };
+    };
+
+    this.loadMainGameMap = function() {
+      let map = {
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+      };
+
+      return map;
+    };
+
+    this.startGame = function(levelMap) {
+      view.style(backToMenuBtn, { display: 'block' });
+
+      marioGame.clearInstances();
+      marioGame.init(levelMap, 1); //initiate level 1 of map
+
+      that.hideMainMenu()
+    };
+
+    this.backToMenu = function() {
+      marioGame.pauseGame(); //pause game when the back button is pressed so that the gameloop doesnt run more than once
+      marioGame.clearTimeOut(); //when mario dies, a timeout starts for resetting the game. Pressing the back button clears that timeout
+      marioGame.removeGameScreen();
+      that.showMainMenu();
+
+      view.style(backToMenuBtn, { display: 'none' });
+    };
+
+    this.hideMainMenu = function() {
+      view.style(startScreen, { display: 'none' });
+    };
+
+    this.showMainMenu = function() {
+      view.style(startScreen, { display: 'block' });
+    };
+  }
+
+  return {
+    getInstance: function() {
+      if (instance == null) {
+        instance = new MarioMaker();
+      }
+
+      return instance;
+    }
+  };
+})();
diff --git a/js/Preloader.js b/js/Preloader.js
new file mode 100644
index 0000000..376a8d4
--- /dev/null
+++ b/js/Preloader.js
@@ -0,0 +1,81 @@
+function Preloader() {
+  let view = View.getInstance();
+  let loadingPercentage;
+  let imageSources;
+  let that = this;
+
+  this.init = function() {
+    loadingPercentage = view.create('div');
+
+    view.addClass(loadingPercentage, 'loading-percentage');
+    view.setHTML(loadingPercentage, '0%');
+    view.appendToBody(loadingPercentage);
+
+    imageSources = {
+      1: 'images/back-btn.png',
+      2: 'images/bg.png',
+      3: 'images/bullet.png',
+      4: 'images/clear-map-btn.png',
+      5: 'images/coin.png',
+      6: 'images/delete-all-btn.png',
+      7: 'images/editor-btn.png',
+      8: 'images/elements.png',
+      9: 'images/enemies.png',
+      10: 'images/flag-pole.png',
+      11: 'images/flag.png',
+      12: 'images/start-screen.png',
+      13: 'images/grid-large-btn.png',
+      14: 'images/grid-medium-btn.png',
+      15: 'images/grid-small-btn.png',
+      16: 'images/grid.png',
+      17: 'images/lvl-size.png',
+      18: 'images/mario-head.png',
+      19: 'images/mario-sprites.png',
+      20: 'images/powerups.png',
+      21: 'images/save-map-btn.png',
+      22: 'images/saved-btn.png',
+      23: 'images/slider-left.png',
+      24: 'images/slider-right.png',
+      25: 'images/start-btn.png'
+    };
+
+    that.loadImages(imageSources);
+  };
+
+  this.loadImages = function(imageSources) {
+    let images = {};
+    let loadedImages = 0;
+    let totalImages = 0;
+
+    for (let key in imageSources) {
+      totalImages++;
+    }
+
+    for (let key in imageSources) {
+      images[key] = new Image();
+      images[key].src = imageSources[key];
+
+      images[key].onload = function() {
+        loadedImages++;
+        percentage = Math.floor(loadedImages * 100 / totalImages);
+
+        view.setHTML(loadingPercentage, percentage + '%'); //displaying percentage
+
+        if (loadedImages >= totalImages) {
+          view.removeFromBody(loadingPercentage);
+          that.initMainApp();
+        }
+      };
+    }
+  };
+
+  this.initMainApp = function() {
+    let marioMakerInstance = MarioMaker.getInstance();
+    marioMakerInstance.init();
+  };
+}
+
+window.onload = function() {
+  let preloader = new Preloader();
+  preloader.init();
+};
diff --git a/js/View.js b/js/View.js
new file mode 100644
index 0000000..38a72d0
--- /dev/null
+++ b/js/View.js
@@ -0,0 +1,66 @@
+//div elements for the application
+let View = (function() {
+  let instance;
+
+  function View() {
+    this.getMainWrapper = function() {
+      let element = document.getElementsByClassName('main-wrapper')[0];
+
+      return element;
+    };
+
+    this.create = function(elementName) {
+      let element = document.createElement(elementName);
+
+      return element;
+    };
+
+    this.addClass = function(element, className) {
+      element.className = className;
+    };
+
+    this.append = function(parentElement, childElement) {
+      //appends everything after the score wrapper and back button in top and everything else in bottom
+      if (childElement.className == 'score-wrapper') {
+        parentElement.insertBefore(childElement, parentElement.firstChild);
+      } else if (parentElement.lastChild && parentElement.lastChild.className == 'btn-wrapper') {
+        parentElement.insertBefore(childElement, parentElement.lastChild);
+      } else {
+        parentElement.appendChild(childElement);
+      }
+    };
+
+    this.appendToBody = function(childElement) {
+      document.body.appendChild(childElement);
+    };
+
+    this.remove = function(parentElement, childElement) {
+      parentElement.removeChild(childElement);
+    };
+
+    this.removeFromBody = function(childElement) {
+      document.body.removeChild(childElement);
+    };
+
+    //style = {display: 'block', position: 'absolute', ...}
+    this.style = function(element, styles) {
+      for (let property in styles) {
+        element.style[property] = styles[property];
+      }
+    };
+
+    this.setHTML = function(element, content) {
+      element.innerHTML = content;
+    };
+  }
+
+  return {
+    getInstance: function() {
+      if (instance == null) {
+        instance = new View();
+      }
+
+      return instance;
+    }
+  };
+})();
diff --git a/js/mainGame/Bullet.js b/js/mainGame/Bullet.js
new file mode 100644
index 0000000..db49c58
--- /dev/null
+++ b/js/mainGame/Bullet.js
@@ -0,0 +1,46 @@
+function Bullet() {
+  let gameUI = GameUI.getInstance();
+
+  let element = new Image();
+  element.src = 'images/bullet.png';
+
+  this.x;
+  this.y;
+  this.velX;
+  this.velY;
+  this.grounded = false;
+  this.sX;
+  this.sY = 0;
+  this.width = 16;
+  this.height = 16;
+
+  let that = this;
+
+  this.init = function(x, y, direction) {
+    that.velX = 8 * direction; //changing the direction of the bullet if mario faces another side
+    that.velY = 0;
+    that.x = x + that.width;
+    that.y = y + 30;
+    that.type = 30;
+    that.sX = 0;
+  };
+
+  this.draw = function() {
+    gameUI.draw(element, that.sX, that.sY, that.width, that.height, that.x, that.y, that.width, that.height);
+  };
+
+  this.update = function() {
+    let gravity = 0.2;
+
+    if (that.grounded) {
+      //bouncing the bullet as it touches the ground
+      that.velY = -4;
+      that.grounded = false;
+    }
+
+    that.velY += gravity;
+
+    that.x += that.velX;
+    that.y += that.velY;
+  };
+}
diff --git a/js/mainGame/Element.js b/js/mainGame/Element.js
new file mode 100644
index 0000000..a90eb3f
--- /dev/null
+++ b/js/mainGame/Element.js
@@ -0,0 +1,70 @@
+function Element() {
+  let gameUI = GameUI.getInstance();
+
+  let element = new Image();
+  element.src = 'images/elements.png';
+
+  this.type;
+  this.sX;
+  this.sY = 0;
+  this.x;
+  this.y;
+  this.width = 32;
+  this.height = 32;
+
+  let that = this;
+
+  this.platform = function() {
+    that.type = 1;
+    that.sX = 0;
+  };
+
+  this.coinBox = function() {
+    that.type = 2;
+    that.sX = 1 * that.width;
+  };
+
+  this.powerUpBox = function() {
+    that.type = 3;
+    that.sX = 2 * that.width;
+  };
+
+  this.uselessBox = function() {
+    that.type = 4;
+    that.sX = 3 * that.width;
+  };
+
+  this.flagPole = function() {
+    that.type = 5;
+    that.sX = 4 * that.width;
+  };
+
+  this.flag = function() {
+    that.type = 6;
+    that.sX = 5 * that.width;
+  };
+
+  this.pipeLeft = function() {
+    that.type = 7;
+    that.sX = 6 * that.width;
+  };
+
+  this.pipeRight = function() {
+    that.type = 8;
+    that.sX = 7 * that.width;
+  };
+
+  this.pipeTopLeft = function() {
+    that.type = 9;
+    that.sX = 8 * that.width;
+  };
+
+  this.pipeTopRight = function() {
+    that.type = 10;
+    that.sX = 9 * that.width;
+  };
+
+  this.draw = function() {
+    gameUI.draw(element, that.sX, that.sY, that.width, that.height, that.x, that.y, that.width, that.height);
+  };
+}
diff --git a/js/mainGame/Enemy.js b/js/mainGame/Enemy.js
new file mode 100644
index 0000000..c6b8c14
--- /dev/null
+++ b/js/mainGame/Enemy.js
@@ -0,0 +1,75 @@
+function Enemy() {
+  let gameUI = GameUI.getInstance();
+
+  let tickCounter = 0; //for animating enemy
+  let maxTick = 10; //max number for ticks to show enemy sprite
+
+  let element = new Image();
+  element.src = 'images/enemies.png';
+
+  this.x;
+  this.y;
+  this.velX = 1;
+  this.velY = 0;
+  this.grounded = false;
+  this.type;
+  this.state;
+
+  this.sX;
+  this.sY = 0;
+  this.width = 32;
+  this.height = 32;
+
+  this.frame = 0;
+
+  let that = this;
+
+  this.goomba = function() {
+    this.type = 20;
+    that.sX = 0;
+  };
+
+  this.draw = function() {
+    that.sX = that.width * that.frame;
+    gameUI.draw(element, that.sX, that.sY, that.width, that.height, that.x, that.y, that.width, that.height);
+  };
+
+  this.update = function() {
+    let gravity = 0.2;
+
+    if (that.grounded) {
+      that.velY = 0;
+    }
+
+    if (that.state == 'dead') {
+      that.frame = 2; //squashed goomba
+
+      tickCounter++;
+      if (tickCounter >= 60) {
+        that.frame = 4;
+      }
+    } else if (that.state == 'deadFromBullet') {
+      //falling goomba
+      that.frame = 3;
+      that.velY += gravity;
+      that.y += that.velY;
+    } else {
+      //only animate when not dead
+      that.velY += gravity;
+      that.x += that.velX;
+      that.y += that.velY;
+
+      //for animating
+      tickCounter += 1;
+
+      if (tickCounter > maxTick) {
+        tickCounter = 0;
+        if (that.frame == 0) {
+          that.frame = 1;
+        } else {
+          that.frame = 0;
+        }
+      }
+    }
+  };
+}
diff --git a/js/mainGame/GameSound.js b/js/mainGame/GameSound.js
new file mode 100644
index 0000000..9a929cb
--- /dev/null
+++ b/js/mainGame/GameSound.js
@@ -0,0 +1,65 @@
+function GameSound() {
+  let coin;
+  let powerUpAppear;
+  let powerUp;
+  let marioDie;
+  let killEnemy;
+  let stageClear;
+  let bullet;
+  let powerDown;
+  let jump;
+
+  let that = this;
+
+  this.init = function() {
+    coin = new Audio('sounds/coin.wav');
+    powerUpAppear = new Audio('sounds/power-up-appear.wav');
+    powerUp = new Audio('sounds/power-up.wav');
+    marioDie = new Audio('sounds/mario-die.wav');
+    killEnemy = new Audio('sounds/kill-enemy.wav');
+    stageClear = new Audio('sounds/stage-clear.wav');
+    bullet = new Audio('sounds/bullet.wav');
+    powerDown = new Audio('sounds/power-down.wav');
+    jump = new Audio('sounds/jump.wav');
+  };
+
+  this.play = function(element) {
+    if (element == 'coin') {
+      coin.pause();
+      coin.currentTime = 0;
+      coin.play();
+    } else if (element == 'powerUpAppear') {
+      powerUpAppear.pause();
+      powerUpAppear.currentTime = 0;
+      powerUpAppear.play();
+    } else if (element == 'powerUp') {
+      powerUp.pause();
+      powerUp.currentTime = 0;
+      powerUp.play();
+    } else if (element == 'marioDie') {
+      marioDie.pause();
+      marioDie.currentTime = 0;
+      marioDie.play();
+    } else if (element == 'killEnemy') {
+      killEnemy.pause();
+      killEnemy.currentTime = 0;
+      killEnemy.play();
+    } else if (element == 'stageClear') {
+      stageClear.pause();
+      stageClear.currentTime = 0;
+      stageClear.play();
+    } else if (element == 'bullet') {
+      bullet.pause();
+      bullet.currentTime = 0;
+      bullet.play();
+    } else if (element == 'powerDown') {
+      powerDown.pause();
+      powerDown.currentTime = 0;
+      powerDown.play();
+    } else if (element == 'jump') {
+      jump.pause();
+      jump.currentTime = 0;
+      jump.play();
+    }
+  };
+}
diff --git a/js/mainGame/Mario.js b/js/mainGame/Mario.js
new file mode 100644
index 0000000..b4ab154
--- /dev/null
+++ b/js/mainGame/Mario.js
@@ -0,0 +1,66 @@
+function Mario() {
+  let gameUI = GameUI.getInstance();
+
+  this.type = 'small';
+  this.x;
+  this.y;
+  this.width = 32;
+  this.height = 44;
+  this.speed = 3;
+  this.velX = 0;
+  this.velY = 0;
+  this.jumping = false;
+  this.grounded = false;
+  this.invulnerable = false;
+  this.sX = 0; // sprite x
+  this.sY = 4; // sprite y
+  this.frame = 0;
+
+  let that = this;
+
+  this.init = function() {
+    that.x = 10;
+    that.y = gameUI.getHeight() - 40 - 40;
+
+    marioSprite = new Image();
+    marioSprite.src = 'images/mario-sprites.png';
+  };
+
+  this.draw = function() {
+    that.sX = that.width * that.frame;
+    gameUI.draw(marioSprite, that.sX, that.sY, that.width, that.height, that.x, that.y, that.width, that.height);
+  };
+
+  this.checkMarioType = function() {
+    if (that.type == 'big') {
+      that.height = 60;
+
+      //big mario sprite position
+      if (that.invulnerable) {
+        that.sY = 276; //if invulnerable, show transparent mario
+      } else {
+        that.sY = 90;
+      }
+    } else if (that.type == 'small') {
+      that.height = 44;
+
+      //small mario sprite
+      if (that.invulnerable) {
+        that.sY = 222; //if invulnerable, show transparent mario
+      } else {
+        that.sY = 4;
+      }
+    } else if (that.type == 'fire') {
+      that.height = 60;
+
+      //fire mario sprite
+      that.sY = 150;
+    }
+  };
+
+  this.resetPos = function() {
+    that.x = canvas.width / 10;
+    that.y = canvas.height - 40;
+    that.frame = 0;
+  };
+}
diff --git a/js/mainGame/MarioGame.js b/js/mainGame/MarioGame.js
new file mode 100644
index 0000000..46aa8c8
--- /dev/null
+++ b/js/mainGame/MarioGame.js
@@ -0,0 +1,870 @@
+//Main Class of Mario Game
+
+function MarioGame() {
+  let gameUI = GameUI.getInstance();
+
+  let maxWidth; //width of the game world
+  let height;
+  let viewPort; //width of canvas, viewPort that can be seen
+  let tileSize;
+  let map;
+  let originalMaps;
+
+  let translatedDist; //distance translated (side scrolled) as mario moves to the right
+  let centerPos; //center position of the viewPort, viewable screen
+  let marioInGround;
+
+  //instances
+  let mario;
+  let element;
+  let gameSound;
+  let score;
+
+  let keys = [];
+  let goombas;
+  let powerUps;
+  let bullets;
+  let bulletFlag = false;
+
+  let currentLevel;
+
+  let animationID;
+  let timeOutId;
+
+  let tickCounter = 0; //for animating mario
+  let maxTick = 25; //max number for ticks to show mario sprite
+  let instructionTick = 0; //showing instructions counter
+  let that = this;
+
+  this.init = function(levelMaps, level) {
+    height = 480;
+    maxWidth = 0;
+    viewPort = 1280;
+    tileSize = 32;
+    translatedDist = 0;
+    goombas = [];
+    powerUps = [];
+    bullets = [];
+
+    gameUI.setWidth(viewPort);
+    gameUI.setHeight(height);
+    gameUI.show();
+
+    currentLevel = level;
+    originalMaps = levelMaps;
+    map = JSON.parse(levelMaps[currentLevel]);
+
+    if (!score) {
+      //so that when level changes, it uses the same instance
+      score = new Score();
+      score.init();
+    }
+    score.displayScore();
+    score.updateLevelNum(currentLevel);
+
+    if (!mario) {
+      //so that when level changes, it uses the same instance
+      mario = new Mario();
+      mario.init();
+    } else {
+      mario.x = 10;
+      mario.frame = 0;
+    }
+    element = new Element();
+    gameSound = new GameSound();
+    gameSound.init();
+
+    that.calculateMaxWidth();
+    that.bindKeyPress();
+    that.startGame();
+  };
+
+  that.calculateMaxWidth = function() {
+    //calculates the max width of the game according to map size
+    for (let row = 0; row < map.length; row++) {
+      for (let column = 0; column < map[row].length; column++) {
+        if (maxWidth < map[row].length * 32) {
+          maxWidth = map[column].length * 32;
+        }
+      }
+    }
+  };
+
+  that.bindKeyPress = function() {
+    let canvas = gameUI.getCanvas(); //for use with touch events
+
+    //key binding
+    document.body.addEventListener('keydown', function(e) {
+      keys[e.keyCode] = true;
+    });
+
+    document.body.addEventListener('keyup', function(e) {
+      keys[e.keyCode] = false;
+    });
+
+    //key binding for touch events
+    canvas.addEventListener('touchstart', function(e) {
+      let touches = e.changedTouches;
+      e.preventDefault();
+
+      for (let i = 0; i < touches.length; i++) {
+        if (touches[i].pageX <= 200) {
+          keys[37] = true; //left arrow
+        }
+        if (touches[i].pageX > 200 && touches[i].pageX < 400) {
+          keys[39] = true; //right arrow
+        }
+        if (touches[i].pageX > 640 && touches[i].pageX <= 1080) {
+          //in touch events, same area acts as sprint and bullet key
+          keys[16] = true; //shift key
+          keys[17] = true; //ctrl key
+        }
+        if (touches[i].pageX > 1080 && touches[i].pageX < 1280) {
+          keys[32] = true; //space
+        }
+      }
+    });
+
+    canvas.addEventListener('touchend', function(e) {
+      let touches = e.changedTouches;
+      e.preventDefault();
+
+      for (let i = 0; i < touches.length; i++) {
+        if (touches[i].pageX <= 200) {
+          keys[37] = false;
+        }
+        if (touches[i].pageX > 200 && touches[i].pageX <= 640) {
+          keys[39] = false;
+        }
+        if (touches[i].pageX > 640 && touches[i].pageX <= 1080) {
+          keys[16] = false;
+          keys[17] = false;
+        }
+        if (touches[i].pageX > 1080 && touches[i].pageX < 1280) {
+          keys[32] = false;
+        }
+      }
+    });
+
+    canvas.addEventListener('touchmove', function(e) {
+      let touches = e.changedTouches;
+      e.preventDefault();
+
+      for (let i = 0; i < touches.length; i++) {
+        if (touches[i].pageX <= 200) {
+          keys[37] = true;
+          keys[39] = false;
+        }
+        if (touches[i].pageX > 200 && touches[i].pageX < 400) {
+          keys[39] = true;
+          keys[37] = false;
+        }
+        if (touches[i].pageX > 640 && touches[i].pageX <= 1080) {
+          keys[16] = true;
+          keys[32] = false;
+        }
+        if (touches[i].pageX > 1080 && touches[i].pageX < 1280) {
+          keys[32] = true;
+          keys[16] = false;
+          keys[17] = false;
+        }
+      }
+    });
+  };
+
+  //Main Game Loop
+  this.startGame = function() {
+    animationID = window.requestAnimationFrame(that.startGame);
+
+    gameUI.clear(0, 0, maxWidth, height);
+
+    if (instructionTick < 1000) {
+      that.showInstructions(); //showing control instructions
+      instructionTick++;
+    }
+
+    that.renderMap();
+
+    for (let i = 0; i < powerUps.length; i++) {
+      powerUps[i].draw();
+      powerUps[i].update();
+    }
+
+    for (let i = 0; i < bullets.length; i++) {
+      bullets[i].draw();
+      bullets[i].update();
+    }
+
+    for (let i = 0; i < goombas.length; i++) {
+      goombas[i].draw();
+      goombas[i].update();
+    }
+
+    that.checkPowerUpMarioCollision();
+    that.checkBulletEnemyCollision();
+    that.checkEnemyMarioCollision();
+
+    mario.draw();
+    that.updateMario();
+    that.wallCollision();
+    marioInGround = mario.grounded; //for use with flag sliding
+  };
+
+  this.showInstructions = function() {
+    gameUI.writeText('Controls: Arrow keys for direction, shift to run, ctrl for bullets', 30, 30);
+    gameUI.writeText('Tip: Jumping while running makes you jump higher', 30, 60);
+  };
+
+  this.renderMap = function() {
+    //setting false each time the map renders so that elements fall off a platform and not hover around
+    mario.grounded = false;
+
+    for (let i = 0; i < powerUps.length; i++) {
+      powerUps[i].grounded = false;
+    }
+    for (let i = 0; i < goombas.length; i++) {
+      goombas[i].grounded = false;
+    }
+
+    for (let row = 0; row < map.length; row++) {
+      for (let column = 0; column < map[row].length; column++) {
+        switch (map[row][column]) {
+          case 1: //platform
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.platform();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 2: //coinBox
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.coinBox();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 3: //powerUp Box
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.powerUpBox();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 4: //uselessBox
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.uselessBox();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 5: //flagPole
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.flagPole();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            break;
+
+          case 6: //flag
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.flag();
+            element.draw();
+            break;
+
+          case 7: //pipeLeft
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.pipeLeft();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 8: //pipeRight
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.pipeRight();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 9: //pipeTopLeft
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.pipeTopLeft();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 10: //pipeTopRight
+            element.x = column * tileSize;
+            element.y = row * tileSize;
+            element.pipeTopRight();
+            element.draw();
+
+            that.checkElementMarioCollision(element, row, column);
+            that.checkElementPowerUpCollision(element);
+            that.checkElementEnemyCollision(element);
+            that.checkElementBulletCollision(element);
+            break;
+
+          case 20: //goomba
+            let enemy = new Enemy();
+            enemy.x = column * tileSize;
+            enemy.y = row * tileSize;
+            enemy.goomba();
+            enemy.draw();
+
+            goombas.push(enemy);
+            map[row][column] = 0;
+        }
+      }
+    }
+  };
+
+  this.collisionCheck = function(objA, objB) {
+    // get the vectors to check against
+    let vX = objA.x + objA.width / 2 - (objB.x + objB.width / 2);
+    let vY = objA.y + objA.height / 2 - (objB.y + objB.height / 2);
+
+    // add the half widths and half heights of the objects
+    let hWidths = objA.width / 2 + objB.width / 2;
+    let hHeights = objA.height / 2 + objB.height / 2;
+    let collisionDirection = null;
+
+    // if the x and y vector are less than the half width or half height, then we must be inside the object, causing a collision
+    if (Math.abs(vX) < hWidths && Math.abs(vY) < hHeights) {
+      // figures out on which side we are colliding (top, bottom, left, or right)
+      let offsetX = hWidths - Math.abs(vX);
+      let offsetY = hHeights - Math.abs(vY);
+
+      if (offsetX >= offsetY) {
+        if (vY > 0 && vY < 37) {
+          collisionDirection = 't';
+          if (objB.type != 5) {
+            //if flagpole then pass through it
+            objA.y += offsetY;
+          }
+        } else if (vY < 0) {
+          collisionDirection = 'b';
+          if (objB.type != 5) {
+            //if flagpole then pass through it
+            objA.y -= offsetY;
+          }
+        }
+      } else {
+        if (vX > 0) {
+          collisionDirection = 'l';
+          objA.x += offsetX;
+        } else {
+          collisionDirection = 'r';
+          objA.x -= offsetX;
+        }
+      }
+    }
+    return collisionDirection;
+  };
+
+  this.checkElementMarioCollision = function(element, row, column) {
+    let collisionDirection = that.collisionCheck(mario, element);
+
+    if (collisionDirection == 'l' || collisionDirection == 'r') {
+      mario.velX = 0;
+      mario.jumping = false;
+
+      if (element.type == 5) {
+        //flag pole
+        that.levelFinish(collisionDirection);
+      }
+    } else if (collisionDirection == 'b') {
+      if (element.type != 5) {
+        //only if not flag pole
+        mario.grounded = true;
+        mario.jumping = false;
+      }
+    } else if (collisionDirection == 't') {
+      if (element.type != 5) {
+        mario.velY *= -1;
+      }
+
+      if (element.type == 3) {
+        //PowerUp Box
+        let powerUp = new PowerUp();
+
+        //gives mushroom if mario is small, otherwise gives flower
+        if (mario.type == 'small') {
+          powerUp.mushroom(element.x, element.y);
+          powerUps.push(powerUp);
+        } else {
+          powerUp.flower(element.x, element.y);
+          powerUps.push(powerUp);
+        }
+
+        map[row][column] = 4; //sets to useless box after powerUp appears
+
+        //sound when mushroom appears
+        gameSound.play('powerUpAppear');
+      }
+
+      if (element.type == 11) {
+        //Flower Box
+        let powerUp = new PowerUp();
+        powerUp.flower(element.x, element.y);
+        powerUps.push(powerUp);
+
+        map[row][column] = 4; //sets to useless box after powerUp appears
+
+        //sound when flower appears
+        gameSound.play('powerUpAppear');
+      }
+
+      if (element.type == 2) {
+        //Coin Box
+        score.coinScore++;
+        score.totalScore += 100;
+
+        score.updateCoinScore();
+        score.updateTotalScore();
+        map[row][column] = 4; //sets to useless box after coin appears
+
+        //sound when coin block is hit
+        gameSound.play('coin');
+      }
+    }
+  };
+
+  this.checkElementPowerUpCollision = function(element) {
+    for (let i = 0; i < powerUps.length; i++) {
+      let collisionDirection = that.collisionCheck(powerUps[i], element);
+
+      if (collisionDirection == 'l' || collisionDirection == 'r') {
+        powerUps[i].velX *= -1; //change direction if collision with any element from the sidr
+      } else if (collisionDirection == 'b') {
+        powerUps[i].grounded = true;
+      }
+    }
+  };
+
+  this.checkElementEnemyCollision = function(element) {
+    for (let i = 0; i < goombas.length; i++) {
+      if (goombas[i].state != 'deadFromBullet') {
+        //so that goombas fall from the map when dead from bullet
+        let collisionDirection = that.collisionCheck(goombas[i], element);
+
+        if (collisionDirection == 'l' || collisionDirection == 'r') {
+          goombas[i].velX *= -1;
+        } else if (collisionDirection == 'b') {
+          goombas[i].grounded = true;
+        }
+      }
+    }
+  };
+
+  this.checkElementBulletCollision = function(element) {
+    for (let i = 0; i < bullets.length; i++) {
+      let collisionDirection = that.collisionCheck(bullets[i], element);
+
+      if (collisionDirection == 'b') {
+        //if collision is from bottom of the bullet, it is grounded, so that it can be bounced
+        bullets[i].grounded = true;
+      } else if (collisionDirection == 't' || collisionDirection == 'l' || collisionDirection == 'r') {
+        bullets.splice(i, 1);
+      }
+    }
+  };
+
+  this.checkPowerUpMarioCollision = function() {
+    for (let i = 0; i < powerUps.length; i++) {
+      let collWithMario = that.collisionCheck(powerUps[i], mario);
+      if (collWithMario) {
+        if (powerUps[i].type == 30 && mario.type == 'small') {
+          //mushroom
+          mario.type = 'big';
+        } else if (powerUps[i].type == 31) {
+          //flower
+          mario.type = 'fire';
+        }
+        powerUps.splice(i, 1);
+
+        score.totalScore += 1000;
+        score.updateTotalScore();
+
+        //sound when mushroom appears
+        gameSound.play('powerUp');
+      }
+    }
+  };
+
+  this.checkEnemyMarioCollision = function() {
+    for (let i = 0; i < goombas.length; i++) {
+      if (!mario.invulnerable && goombas[i].state != 'dead' && goombas[i].state != 'deadFromBullet') {
+        //if mario is invulnerable or goombas state is dead, collision doesnt occur
+        let collWithMario = that.collisionCheck(goombas[i], mario);
+
+        if (collWithMario == 't') {
+          //kill goombas if collision is from top
+          goombas[i].state = 'dead';
+
+          mario.velY = -mario.speed;
+
+          score.totalScore += 1000;
+          score.updateTotalScore();
+
+          //sound when enemy dies
+          gameSound.play('killEnemy');
+        } else if (collWithMario == 'r' || collWithMario == 'l' || collWithMario == 'b') {
+          goombas[i].velX *= -1;
+
+          if (mario.type == 'big') {
+            mario.type = 'small';
+            mario.invulnerable = true;
+            collWithMario = undefined;
+
+            //sound when mario powerDowns
+            gameSound.play('powerDown');
+
+            setTimeout(function() {
+              mario.invulnerable = false;
+            }, 1000);
+          } else if (mario.type == 'fire') {
+            mario.type = 'big';
+            mario.invulnerable = true;
+
+            collWithMario = undefined;
+
+            //sound when mario powerDowns
+            gameSound.play('powerDown');
+
+            setTimeout(function() {
+              mario.invulnerable = false;
+            }, 1000);
+          } else if (mario.type == 'small') {
+            //kill mario if collision occurs when he is small
+            that.pauseGame();
+
+            mario.frame = 13;
+            collWithMario = undefined;
+
+            score.lifeCount--;
+            score.updateLifeCount();
+
+            //sound when mario dies
+            gameSound.play('marioDie');
+
+            timeOutId = setTimeout(function() {
+              if (score.lifeCount == 0) {
+                that.gameOver();
+              } else {
+                that.resetGame();
+              }
+            }, 3000);
+            break;
+          }
+        }
+      }
+    }
+  };
+
+  this.checkBulletEnemyCollision = function() {
+    for (let i = 0; i < goombas.length; i++) {
+      for (let j = 0; j < bullets.length; j++) {
+        if (goombas[i] && goombas[i].state != 'dead') {
+          //check for collision only if goombas exist and is not dead
+          let collWithBullet = that.collisionCheck(goombas[i], bullets[j]);
+        }
+
+        if (collWithBullet) {
+          bullets[j] = null;
+          bullets.splice(j, 1);
+
+          goombas[i].state = 'deadFromBullet';
+
+          score.totalScore += 1000;
+          score.updateTotalScore();
+
+          //sound when enemy dies
+          gameSound.play('killEnemy');
+        }
+      }
+    }
+  };
+
+  this.wallCollision = function() {
+    //for walls (vieport walls)
+    if (mario.x >= maxWidth - mario.width) {
+      mario.x = maxWidth - mario.width;
+    } else if (mario.x <= translatedDist) {
+      mario.x = translatedDist + 1;
+    }
+
+    //for ground (viewport ground)
+    if (mario.y >= height) {
+      that.pauseGame();
+
+      //sound when mario dies
+      gameSound.play('marioDie');
+
+      score.lifeCount--;
+      score.updateLifeCount();
+
+      timeOutId = setTimeout(function() {
+        if (score.lifeCount == 0) {
+          that.gameOver();
+        } else {
+          that.resetGame();
+        }
+      }, 3000);
+    }
+  };
+
+  //controlling mario with key events
+  this.updateMario = function() {
+    let friction = 0.9;
+    let gravity = 0.2;
+
+    mario.checkMarioType();
+
+    if (keys[38] || keys[32]) {
+      //up arrow
+      if (!mario.jumping && mario.grounded) {
+        mario.jumping = true;
+        mario.grounded = false;
+        mario.velY = -(mario.speed / 2 + 5.5);
+
+        // mario sprite position
+        if (mario.frame == 0 || mario.frame == 1) {
+          mario.frame = 3; //right jump
+        } else if (mario.frame == 8 || mario.frame == 9) {
+          mario.frame = 2; //left jump
+        }
+
+        //sound when mario jumps
+        gameSound.play('jump');
+      }
+    }
+
+    if (keys[39]) {
+      //right arrow
+      that.checkMarioPos(); //if mario goes to the center of the screen, sidescroll the map
+
+      if (mario.velX < mario.speed) {
+        mario.velX++;
+      }
+
+      //mario sprite position
+      if (!mario.jumping) {
+        tickCounter += 1;
+
+        if (tickCounter > maxTick / mario.speed) {
+          tickCounter = 0;
+
+          if (mario.frame != 1) {
+            mario.frame = 1;
+          } else {
+            mario.frame = 0;
+          }
+        }
+      }
+    }
+
+    if (keys[37]) {
+      //left arrow
+      if (mario.velX > -mario.speed) {
+        mario.velX--;
+      }
+
+      //mario sprite position
+      if (!mario.jumping) {
+        tickCounter += 1;
+
+        if (tickCounter > maxTick / mario.speed) {
+          tickCounter = 0;
+
+          if (mario.frame != 9) {
+            mario.frame = 9;
+          } else {
+            mario.frame = 8;
+          }
+        }
+      }
+    }
+
+    if (keys[16]) {
+      //shift key
+      mario.speed = 4.5;
+    } else {
+      mario.speed = 3;
+    }
+
+    if (keys[17] && mario.type == 'fire') {
+      //ctrl key
+      if (!bulletFlag) {
+        bulletFlag = true;
+        let bullet = new Bullet();
+        if (mario.frame == 9 || mario.frame == 8 || mario.frame == 2) {
+          let direction = -1;
+        } else {
+          let direction = 1;
+        }
+        bullet.init(mario.x, mario.y, direction);
+        bullets.push(bullet);
+
+        //bullet sound
+        gameSound.play('bullet');
+
+        setTimeout(function() {
+          bulletFlag = false; //only lets mario fire bullet after 500ms
+        }, 500);
+      }
+    }
+
+    //velocity 0 sprite position
+    if (mario.velX > 0 && mario.velX < 1 && !mario.jumping) {
+      mario.frame = 0;
+    } else if (mario.velX > -1 && mario.velX < 0 && !mario.jumping) {
+      mario.frame = 8;
+    }
+
+    if (mario.grounded) {
+      mario.velY = 0;
+
+      //grounded sprite position
+      if (mario.frame == 3) {
+        mario.frame = 0; //looking right
+      } else if (mario.frame == 2) {
+        mario.frame = 8; //looking left
+      }
+    }
+
+    //change mario position
+    mario.velX *= friction;
+    mario.velY += gravity;
+
+    mario.x += mario.velX;
+    mario.y += mario.velY;
+  };
+
+  this.checkMarioPos = function() {
+    centerPos = translatedDist + viewPort / 2;
+
+    //side scrolling as mario reaches center of the viewPort
+    if (mario.x > centerPos && centerPos + viewPort / 2 < maxWidth) {
+      gameUI.scrollWindow(-mario.speed, 0);
+      translatedDist += mario.speed;
+    }
+  };
+
+  this.levelFinish = function(collisionDirection) {
+    //game finishes when mario slides the flagPole and collides with the ground
+    if (collisionDirection == 'r') {
+      mario.x += 10;
+      mario.velY = 2;
+      mario.frame = 11;
+    } else if (collisionDirection == 'l') {
+      mario.x -= 32;
+      mario.velY = 2;
+      mario.frame = 10;
+    }
+
+    if (marioInGround) {
+      mario.x += 20;
+      mario.frame = 10;
+      tickCounter += 1;
+      if (tickCounter > maxTick) {
+        that.pauseGame();
+
+        mario.x += 10;
+        tickCounter = 0;
+        mario.frame = 12;
+
+        //sound when stage clears
+        gameSound.play('stageClear');
+
+        timeOutId = setTimeout(function() {
+          currentLevel++;
+          if (originalMaps[currentLevel]) {
+            that.init(originalMaps, currentLevel);
+            score.updateLevelNum(currentLevel);
+          } else {
+            that.gameOver();
+          }
+        }, 5000);
+      }
+    }
+  };
+
+  this.pauseGame = function() {
+    window.cancelAnimationFrame(animationID);
+  };
+
+  this.gameOver = function() {
+    score.gameOverView();
+    gameUI.makeBox(0, 0, maxWidth, height);
+    gameUI.writeText('Game Over', centerPos - 80, height - 300);
+    gameUI.writeText('Thanks For Playing', centerPos - 122, height / 2);
+  };
+
+  this.resetGame = function() {
+    that.clearInstances();
+    that.init(originalMaps, currentLevel);
+  };
+
+  this.clearInstances = function() {
+    mario = null;
+    element = null;
+    gameSound = null;
+
+    goombas = [];
+    bullets = [];
+    powerUps = [];
+  };
+
+  this.clearTimeOut = function() {
+    clearTimeout(timeOutId);
+  };
+
+  this.removeGameScreen = function() {
+    gameUI.hide();
+
+    if (score) {
+      score.hideScore();
+    }
+  };
+
+  this.showGameScreen = function() {
+    gameUI.show();
+  };
+}
diff --git a/js/mainGame/PowerUp.js b/js/mainGame/PowerUp.js
new file mode 100644
index 0000000..e472d3b
--- /dev/null
+++ b/js/mainGame/PowerUp.js
@@ -0,0 +1,52 @@
+function PowerUp() {
+  let gameUI = GameUI.getInstance();
+
+  let element = new Image();
+  element.src = 'images/powerups.png';
+
+  this.type;
+  this.x;
+  this.y;
+  this.velX = 2;
+  this.velY = 0;
+  this.grounded = false;
+  this.sX;
+  this.sY = 0;
+  this.width = 32;
+  this.height = 32;
+
+  let that = this;
+
+  this.mushroom = function(x, y) {
+    that.x = x;
+    that.y = y - that.height;
+    that.type = 30;
+    that.sX = 0;
+  };
+
+  this.flower = function(x, y) {
+    that.x = x;
+    that.y = y - that.height;
+    that.type = 31;
+    that.sX = 32;
+  };
+
+  this.draw = function() {
+    gameUI.draw(element, that.sX, that.sY, that.width, that.height, that.x, that.y, that.width, that.height);
+  };
+
+  this.update = function() {
+    if (that.type == 30) {
+      let gravity = 0.2;
+
+      if (that.grounded) {
+        that.velY = 0;
+      }
+
+      that.velY += gravity;
+
+      that.x += that.velX;
+      that.y += that.velY;
+    }
+  };
+}
diff --git a/js/mainGame/Score.js b/js/mainGame/Score.js
new file mode 100644
index 0000000..58bf604
--- /dev/null
+++ b/js/mainGame/Score.js
@@ -0,0 +1,88 @@
+function Score() {
+  let view = View.getInstance();
+
+  let mainWrapper;
+  let scoreWrapper;
+  let coinScoreWrapper;
+  let totalScoreWrapper;
+  let lifeCountWrapper;
+  let levelWrapper;
+
+  this.coinScore;
+  this.totalScore;
+  this.lifeCount;
+
+  let that = this;
+
+  this.init = function() {
+    that.coinScore = 0;
+    that.totalScore = 0;
+    that.lifeCount = 3;
+
+    mainWrapper = view.getMainWrapper();
+
+    scoreWrapper = view.create('div');
+    coinScoreWrapper = view.create('div');
+    totalScoreWrapper = view.create('div');
+    lifeCountWrapper = view.create('div');
+    levelWrapper = view.create('div');
+
+    view.addClass(scoreWrapper, 'score-wrapper');
+    view.addClass(coinScoreWrapper, 'coin-score');
+    view.addClass(totalScoreWrapper, 'total-score');
+    view.addClass(lifeCountWrapper, 'life-count');
+    view.addClass(levelWrapper, 'level-num');
+
+    view.append(scoreWrapper, levelWrapper);
+    view.append(scoreWrapper, lifeCountWrapper);
+    view.append(scoreWrapper, coinScoreWrapper);
+    view.append(scoreWrapper, totalScoreWrapper);
+    view.append(mainWrapper, scoreWrapper);
+
+    that.updateCoinScore();
+    that.updateTotalScore();
+    that.updateLifeCount();
+    that.updateLevelNum(1);
+  };
+
+  this.updateCoinScore = function() {
+    if (that.coinScore == 100) {
+      that.coinScore = 0;
+      that.lifeCount++;
+      that.updateLifeCount();
+    }
+
+    view.setHTML(coinScoreWrapper, 'Coins: ' + that.coinScore);
+  };
+
+  this.updateTotalScore = function() {
+    view.setHTML(totalScoreWrapper, 'Score: ' + that.totalScore);
+  };
+
+  this.updateLifeCount = function() {
+    view.setHTML(lifeCountWrapper, 'x ' + that.lifeCount);
+  };
+
+  this.updateLevelNum = function(level) {
+    view.setHTML(levelWrapper, 'Level: ' + level);
+  };
+
+  this.displayScore = function() {
+    view.style(scoreWrapper, { display: 'block', background: '#add1f3' });
+  };
+
+  this.hideScore = function() {
+    view.style(scoreWrapper, { display: 'none' });
+
+    that.coinScore = 0;
+    that.lifeCount = 5;
+    that.totalScore = 0;
+    that.updateCoinScore();
+    that.updateTotalScore();
+    that.updateLifeCount();
+  };
+
+  this.gameOverView = function() {
+    view.style(scoreWrapper, { background: 'black' });
+  };
+}
diff --git a/manifest.json b/manifest.json
new file mode 100644
index 0000000..04c838e
--- /dev/null
+++ b/manifest.json
@@ -0,0 +1,19 @@
+{
+  "manifest_version": 3,
+  "name": "Mario Game | Chrome Extension",
+  "version": "1.0",
+  "description": "Replace the Chrome Dino game with the Mario game during network errors.",
+  "permissions": ["webRequest", "activeTab", "tabs"],
+  "host_permissions": ["<all_urls>"],
+  "background": {
+    "service_worker": "background.js"
+  },
+  "action": {
+    "default_popup": "popup.html",
+    "default_icon": {
+      "16": "./images/icon16.png",
+      "48": "./images/icon48.png",
+      "128": "./images/icon128.png"
+    }
+  }
+}
\ No newline at end of file
diff --git a/popup.html b/popup.html
new file mode 100644
index 0000000..aa8ed06
--- /dev/null
+++ b/popup.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Mario Game | Chrome Extension</title>
+  <style>
+    body {
+      width: 480px;
+      height: 192px;
+      font-family: Arial, sans-serif;
+      margin: 0px;
+      padding: 0px;
+      background: url('./images/popup.png');
+      background-size: cover;
+      background-position: center;
+      background-repeat: no-repeat;
+      margin: 16px;
+    }
+
+    h2 {
+      font-weight: bold;
+      font-size: 16px;
+    }
+
+    p {
+      font-size: 14px;
+    }
+
+    a {
+      text-decoration: underline;
+      font-style: italic;
+    }
+  </style>
+</head>
+<body>
+  <h2>Jump into adventure and save the Kingdom with Mario</h2>
+  <p>Replace the Chrome Dino game with the Mario game during network errors.</p>
+  
+  <p>Developed by <a target="_blank" href="https://github.com/sohamgoswami07">Soham Goswami</a></p>
+  <p>Mario game code taken from <a target="_blank" href="https://varunbanka.github.io/">Varun Banka</a> | <a href="https://github.com/VarunBanka">Github</a></p>
+  <p></p>
+</body>
+</html>
diff --git a/sounds/bullet.wav b/sounds/bullet.wav
new file mode 100644
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