@Smitty407 If you make a appearing-by-itself-in-the-bigining-of-level monster into sheep, unlike other monsters, killing the sheep won't make surrounding panels bright and openable. Of course I didn't hasitate to slay a sheep at all, and reach a deadlock. The last panel stayed dark with blocking pits (I mean hole, not damaging trap) and wall.
Something I've been worrying about just happend. No key, whole floor opened except one panel surrounded with pit, pit, wall and sheep that was axe thrower. Nothing to do except page reload... Anyway, awesome game:)