The play area is an 8 x 8 grid full of 8 different kinds of blocks. When 4 blocks of the same kind form the 4 corners of a square (small, large, tilted), those 4 blocks will be destroyed and new blocks will be formed. You can try to destroy the blocks by moving them in position. To move the blocks, you select 4 blocks that are adjacent to each other and then rotate them clockwise or counter clockwise.