Examine source code of Green Dragon Hell

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Green Dragon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(70, 154, 64, 0)",
      "toolbar_text": "rgb(12, 240, 54)",
      "frame": "rgb(33, 140, 26)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(255, 255, 255, 0.72)",
      "toolbar_field_text": "rgb(41, 32, 100)",
      "tab_line": "rgb(255, 14, 0)",
      "popup": "rgb(103, 255, 133)",
      "popup_text": "rgb(157, 18, 18)",
      "tab_loading": "rgb(255, 14, 0)"
    }
  }
}