The goal of the game is to move the red block onto the red tile, by removing all other tiles. Tiles are removed then you step off them. There are three types of tiles. On white tiles you can step one time. On black tiles you can step two times. The blue tile works as teleport. To move the block, use arrow keys.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.