Glass Tower

Glass Tower is a game with physical collisions and gravity simulation.
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".