I've just released my first Android game. Wooo! Took just under a week to develop, start to finish.
It's a puzzle game with 90 levels, ranging from Easy to Medium to Hard. It also includes a random level generator, which challenges you to complete as many consecutive, randomly-generated levels as you can before you need to give up. If you're in the mood to stump a friend, it also includes a level editor for creating your own puzzles.