Examine source code of Classic space invaders

{
  "theme": {
    "images": {
      "theme_frame": "Spaceinvaderstest2.png"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Classic space invaders",
  "manifest_version": 2,
  "description": "Was annoyed at the lack of space invader personas so thought I'd help :D"
}