Press [up] [w] [space] or click to jump and to jump on yellow rings Avoid the spikes In ship mode, hold to fly up and release to fly down Hit a yellow pad to jump high For bonus points, collect the coins Press [l] to toggle effects Press [z] and [m] for editor 1 - Blocks 2 - Inside geometry 3 - Spikes 4 - 4 long blocks 5 - Special 6 - Speed Portals and more 7 - Slopes and more 8 - New Pits and more 9 - Monsters and more 0 - Invisible blocks Press [n] for noclip
Extreme demon by cs4563412 that is rated 10 stars.
