Examine source code of Goomba World

{
  "theme": {
    "images": {
      "theme_frame": "headergoomba.jpg"
    },
    "colors": {
      "frame": "#9ff5ee",
      "tab_background_text": "#99faf4"
    }
  },
  "version": "2.0",
  "name": "Goomba World",
  "manifest_version": 2,
  "description": "Goomba"
}