 Defeating all the Octy on the current floor will open up a pipe at the bottom of the floor, and the player will have to find and enter it in order to proceed to the next one.The boss floors feature a giant enemy (a Blue Worm in Worlds 1, 3, 5 and 7, a Turning Eye in Worlds 2, 4 and 6, and the Octy King himself in World 8) who must be killed in order to proceed to the next world.