Topple is one of those addictive games that once you start its hard to stop. The basics of the game is to stack pieces has high as you can without it toppling over, one of the sweet thing is that you can use the accelerometer and tip you iPhone to balance the stack as you go.

Topples interaction is a simple tap and drag interface that is easy to use and understand, but mixed with the accelerometer to keep the stack balanced makes it a challenging and interesting game.

View Topple in action:

[Ed: Topple 2 is available too now, with new modes like balance and invert gravity as well as the ability to play against a friend.]