Dumball is a very casual (and sometimes frantic) game. It's a very simple game to play but can get very challenging.
The goal is to bounce the ball on a trampoline that is the same color as your ball. Tilt the iPhone or iPod Touch left or right to control the ball. The ball changes color every time it bounces on a trampoline, making it more challenging as the game progresses.
To add even more excitement, other items will appear on the screen as your score gets higher.
More challenges will be added soon.
source : itunes.apple.com