It is a tilting ball game with some twists, you have to collect all the bones in the stage while avoiding falling into the water.
The first stages are quite easy, but it gets harder as you progress
There's two versions, the free lite version, and a full version with lots of levels.
http://itunes.apple.com/us/app/splash-ball/id446679538
http://itunes.apple.com/us/app/splash-ball-lite/id446810780
And here's a trailer:
http://www.youtube.com/watch?v=084ETmUQJKw