I played the game, and its really awesome.

Epic traps, good bosses and nice design

Also heres a bug i found today...
Go to Chapter 3, using the password. (DONT USE THE SAVE)
After loading the Chapter, you should fall down, double-jump really fast.
You should have been died, press R and you should be at your latest save, with the wrong music.
Phase 1 of Exor had the loludied song, pase 2 had the Night Club music, and 3...?
You should fix that bug!
note: this only works on 0.51b!