Examine source code of bowling floor

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "bowling floor",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgb(4, 5, 40)",
      "toolbar_text": "rgba(248, 91, 145, 0.75)",
      "frame": "rgb(12, 28, 109)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(19, 15, 40, 0.27)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(112, 189, 248)",
      "popup": "rgba(4, 5, 40, 0.86)",
      "popup_text": "rgb(98, 102, 183)",
      "ntp_background": "rgb(4, 5, 40)",
      "ntp_text": "rgba(255, 255, 255, 0.86)",
      "tab_loading": "rgb(112, 189, 248)"
    }
  }
}