Unfortunately, Fuego's River Adventure isn't actually that great of a game. It's extremely simple, the controls aren't precise enough to really make it fun, and while there are about 20 stages to float through where you need to go down a river dodging obstacles and picking up bonus items. I was done after about the second stage.
Fuego's River Adventure works much better as a tech demo, but it uses some really interesting code. The game runs on your iPad 2, and it needs that camera to serve as a controller. To play, you move your body back and forth in front of the camera