[iFuzzy]

Just to give an addition to Mattkan's question:

Well actually, it's because we wanted to get rid of all the silly lava tiles that we wouldn't need to Level Design with. What me and Mattkan did was change the tileset by replace the lava bubble or something with a custom tile. So now if I go in that custom tile (which is supposed to be a rug), we just start swimming in it.