Flappy Circle

Make the circle jump and avoid hitting the line!. How far can you go? WARNING: Highly Addicting!
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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Flappy Circle",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "manifest_version": 2,
  "version": "0.22",
  "app": {
    "launch": {
      "web_url": "http://www.tanksw.com/flappy-circle/"
    },
    "urls": [
      "http://www.tanksw.com/flappy-circle/"
    ]
  },
  "icons": {
    "16": "icon_16.png",
    "128": "icon_128.png"
  }
}