Once a block is in the correct position and has the correct color, the Angry Block turns into a Happy Block.
The faster you complete the whole structure the more points you get.
It starts off easy but soon you will have to use more blocks and more colors.
And blocks will disappear to throw you off!
There are several Game Modes or playing fields:
2 by 4 blocks, 3 by 5 blocks or 4 by 7 blocks.
In addition there is a 'Free Style' mode, specially for kids.