Gameplay seems to be easy at first.
The tower is constructed of blocks which are different in size, shape and color.
Your aim is to break all blue blocks and to save as many red blocks as possible.
Blue blocks add a score. Its amount depends on the size of the block. Red blocks subtract your score the same way.
Also every broken red block subtract one "life". You have 3 lives at the beginning of each level.
Due to physical-based engine every level can be over in different ways.
Some blocks contain bonuses. When you break such block - the bonus takes off and rises on screen edge.
You should have time to "catch" it, by taping on it by finger. Action of each bonus is explained during gameplay.
Your game progress is always saved, so you can continue playing last level you reached any time.