Android Mash is a game in which an Android dude jumps randomly around the screen and you try to mash it. You'll learn about timer events, randomness, and be introduced to animation.
Check out the app and see what you'll learn.
Add a Canvas and image sprite, then add blocks so that the mole moves randomly and touching it causes the phone to vibrate
Add blocks so that touching the mole increments the score, the game ends at a certain score, and you can restart the game.
Add blocks so that the score is incremented, the game ends at a certain score, and the game can be restarted (solution to challenge)