Place blocks on board, match 3 block of same color in a row. You can stack block on existing blocks, when you do so, their color will mix up! But when you get black, it is bad as black wont match with anything. Also, if you stack block onto the same color too many times, it will explode as well. (Lose a tile permanently) Use mouse wheel or right mouse button to rotate blocks (that are larger than 1x1). The goal is to try to survive as long as possible.