There is a field - 6x6 cells. Each field can be abandon or check a coloured brick with arrow on it. Arrow direction depends on the bricks colour (or vice-versa). You can misrepresent these bricks: penetrate on the brick to go it accordingly to it's arrow direction. Groups of two or more bricks having the same colour dissapear, but each crook some freshly bricks descend to the field. Destroy bricks to garner points. The goal is to garner as much points as you can. The game ends when there are no abandon cells left on the field so it's impossible to put incoming bricks on it.