The goal of the game is to rearrange the square blocks with pipes on them in such a matter that the pipes connect at the right places and form a path for a laser to travel from the start to the end point. There is always only one blank space in which you can move the blocks in. The start and end point are different in every level. You move the block by sliding them in the right place. You also have the option to redo your moves and to restart the level. You have unlimited number of moves but to reach 3 or 2 stars there are certain move limitations.