Catacomb Abyss

Press [F10]+
[W] : Warp (Level 5 is secret)
[Z] : Freeze Monsters
[I] : Extra Items
[G] : God Mode
[E] : Skip (Exit) Current Level
[O] : Overhead View
[M] : Memory Usage Info
[P] : Unknown
[1] thru [8] give you a scroll (Information from Cheat Machine)