I named this project Jewelanche, after the flash game I based it on, which you can find here.
This is a really simple game: Shapes fall from above and pile up at the bottom. You have to connect similar shapes in chains in order to eliminate them. The object of the game is to last as long as possible without the screen filling up with shapes.
I used AndEngine for this project, which is an OpenGL game engine for Android only. The learning curve wasn't too steep for me, as I had already experimented with the Android canvas, and Box2D (a physics engine).