Examine source code of Falling Planet

{
  "theme": {
    "images": {
      "theme_frame": "Sonnet_by_cugar.jpg"
    },
    "colors": {
      "frame": "#030303",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Falling Planet",
  "manifest_version": 2,
  "description": "The beautiful moon is the only witness to the catastrophy of a fallen planet."
}