Such a special labyrinth: one with different floors, each of these floors containing a door, key or other challenge. So you'll have to change floor continuously to gather all the parts you need to reach the exit. Stars are worth additional points, but they're not necessary to pass on to another level. Keys are, though: without them you can't open the doors you have to go through to reach the exit. A fun brain game that also puts your speed to the test!
Use the arrow keys to move around. Press A and Z to switch layers.