You have to tilt and turn the iPad to get the ball to move, which is exactly like the real-life equivalent: it is tricky.
This visually appealing application is a self-starter for children older than 6 and the boards keep changing and becoming more difficult as your skill level increases.
Tilt the screen and the ball moves that way... The real-life physics is amazing, it really feels just like a 'real' metal ball, weight and all!
A great way to get to understand the tilt-ability of the iPad. Watch this video to see for yourself how cool it is!
My brother and I are into making our own Labyrinth levels which is easy to set up and do. In order to create the levels ,you need to be stationed at the computer rather than the iPad, but the results are instantly transferred to the iPad allowing us to try out our own levels - straight away. Neat!