Rabbit Sniper is a challenging game in which you must use your skills to determine the perfect shoots for destroying your enemies. Rabbit Sniper is a widget and allows you to play from your Dashboard.
The Rabbit Sniper widget will install via its built mechanism and all you have to do is double click the .wdgt file resulted after unarchiving the downloaded package. Once installed, your Dashboard will become active and will display the new widget.
To learn more about dealing with the Mac OS X Dashboard you can easily access the Apple support page HERE.