Replica Island

http://code.google.com/p/replicaisland

Perhaps you want to make a 2D, side-scrolling game for the Android platform but have no clue how to get started. Well, it’s your lucky day because the cool side-scrolling game Replica Island features none other than the little green android (BugDroid) that developers know and love. Replica Island is not only a popular, free game on the Google Play Store, it’s also an open source learning tool for game developers.