Fixed Issue kubowania#5 Keycode-Deprecation

app.js

@@ -78,13 +78,13 @@ document.addEventListener('DOMContentLoaded', () => {
   function control(e) {
     squares[currentIndex].classList.remove('snake')
 
-    if(e.keyCode === 39) {
+    if(e.code === "ArrowRight") {
       direction = 1 //if we press the right arrow on our keyboard, the snake will go right one
-    } else if (e.keyCode === 38) {
+    } else if (e.code === "ArrowUp") {
       direction = -width // if we press the up arrow, the snake will go back ten divs, appearing to go up
-    } else if (e.keyCode === 37) {
+    } else if (e.code === "ArrowLeft") {
       direction = -1 // if we press left, the snake will go left one div
-    } else if (e.keyCode === 40) {
+    } else if (e.code === "ArrowDown") {
       direction = +width //if we press down, the snake head will instantly appear in the div ten divs from where you are now
     }
   }