Somewhere in the southeast side of Creepy Crypt there is a barred off exit, that when you press against the bars, you can leave and go to some other area you shouldn't be at. If you try to get back into Creepy Crypt, you can't. The area is after the final objective, instead of going north, you go east, keep going for one intersection, and go south, pass one intersection and then go west, at the end of this, there is the bars. I figured this out by accident and now can't beat the level.