Spinning Carrot is a small free android game.
The game is a small arcade game, in which the user has to scroll the screen downwards, while the carrot is swinging left and right, while avoiding the obstacles.
The further the carrot gets, without hitting any obstacles, the higher the score.
The game uses Google Play Services to implement achievements and leaderboards.
Check out the game on google play here.
Here I provide the full project to the game.
This includes implementing Google Play SDK, AdMob SDK and a Facebook API for registering app-installs.
Using the SDK's and the API is optional, but you will need a Google application id, a Facebook App id and a AdMob ad-unit id to use them.