This plugin adds a button that leads to an apps listing on the Google Play market.It also adds a button to share your app.
Configure button image and app to launch in the Google Play Market. You just enter the package name in the control panel. Here's where to find in in eclipse:
https://www.dropbox.com/s/46xxbsew88js5du/package%20name.PNG

You can also change the background
to have two gradient colors. Refer to krompas post here for more details and ideas:

https://www.buzztouch.com/forum/thread.php?tid=EDC80C2FD7699DF424A9D33&command=isSearching¤tPage=1&topicTitle=gradient&createdBy=&repliedBy=&minViews=-1&maxViews=-1&minReplies=-1&maxReplies=-1&forumCategory=

iOS Project
------------------------
ANDROID ONLY

Android Project
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CM_launchPlay.java
cm_launchplay.xml

Version History
----------------------------
1.0 - initial release
2.0 - added ability to add gradient background colors
2.1 - added transparent background to buttons
2.2 - added new screenshot folders

JSON Data
------------------------
{
"itemId": "A3FC512A1CAAE49480D0827",
"itemType": "CM_launchPlay",
"itemNickname": "launch play",
"navBarTitleText": "launch play",
"packPlay": "com.rovio.gold",
"playButt": "gplay",
"playButt2": "shareplay",
"playLink": "https://play.google.com/store/apps/details?id=com.rovio.gold",
"playView": "screenshot",
"launchPlayBackBottom": "#00FFCC",
"launchPlayBackTop": "#FF3300"
}