Alien invasion!

Shoot down different aliens attacking earth and progressively improve ship. 2D offline space shooter, keyboard and mouse required.

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  },
  "description": "Shoot down different aliens attacking earth and progressively improve ship. 2D offline space shooter, keyboard and mouse required.",
  "icons": {
    "16": "icon/16.png",
    "19": "icon/19.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png",
    "256": "icon/256.png"
  },
  "manifest_version": 2,
  "name": "Alien invasion!",
  "offline_enabled": true,
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "version": "1.0.53"
}