- add metadata

ports/megaball/README.md

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+## Notes
+
+Thanks [helpcomputer](https://helpcomputer.itch.io) (Adam) for creating this fantastic game and releasing it under an MIT license.
+
+
+## Controls
+
+| Button | Action        |
+| D-PAD  | Movement      |
+| START  | Menu          |
+| A      | Self-destruct |
+
+
+## Compile
+
+```shell
+apt update
+apt install wget git python3-venv   # python >=3.8 is required
+
+# Setup pyxel virtual env
+python3 -m venv pyxel-venv
+source pyxel-venv/bin/activate
+pip install pyxel
+
+# Test the game
+git clone https://github.com/tabreturn/PortMaster-New.git
+cd ports/megaball
+pyxel run megaball/gamedata/main.py
+```

ports/megaball/gameinfo.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<gameList>
+  <game>
+    <path>./Megaball.sh</path>
+    <name>Megaball</name>
+    <desc>The goal is to roll the ball over every flashing panel to complete the stage. For each stage you complete, you gain one extra life. If you need to, you can self-destruct (and lose a life) and shatter into ten pieces, killing any enemy which collides with these pieces; you will immediately re-spawn, and the enemy will reappear in 5 seconds.</desc>
+    <releasedate>20200906T000000</releasedate>
+    <developer>helpcomputer (Adam)</developer>
+    <publisher>helpcomputer</publisher>
+    <genre>Arcade</genre>
+    <image>./megaball/screenshot.png</image>
+  </game>
+</gameList>

ports/megaball/port.json

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+{
+  "version": 3,
+  "name": "megaball.zip",
+  "items": [
+    "Megaball.sh",
+    "megaball"
+  ],
+  "items_opt": null,
+  "attr": {
+    "title": "Megaball",
+    "porter": [
+      "tabreturn"
+    ],
+    "desc": "The goal is to roll the ball over every flashing panel to complete the stage. For each stage you complete, you gain one extra life. If you need to, you can self-destruct (and lose a life) and shatter into ten pieces, killing any enemy which collides with these pieces; you will immediately re-spawn, and the enemy will reappear in 5 seconds.",
+    "desc_md": null,
+    "inst": "Ready to run! Thanks helpcomputer (https://helpcomputer.itch.io) for releasing this game under an MIT license.",
+    "inst_md": "Ready to run! Thanks [helpcomputer](https://helpcomputer.itch.io) for releasing this game under an MIT license.",
+    "genres": [
+      "arcade"
+    ],
+    "image": {},
+    "rtr": true,
+    "exp": false,
+    "runtime": "pyxel_2.2.8_python_3.11",
+    "reqs": [],
+    "arch": []
+  }
+}