Roll your rectangular block through each stage to get it to fall through the square hole. If your block falls off of the playing field, you will have to restart the level. Also, avoid standing the block vertically on an orange tile or it will fall through. Some levels contain switches which make bridges appear/disappear when activated. X-shaped switches can only be activated when your block stands upright on them, while circular switches can be pressed with any part of your block. In later levels, a switch will appear. These switches will split your block into two smaller blocks and teleport them to different locations. The two blocks must reunite in order to fall through the hole.