Well, your hack is broken. There's a room in Dungeon 1 (location 42) where a shutter door is supposed to open (seemingly) after all enemies are killed, and it doesn't. I have the correct original ROM, I did the checksums. I don't even understand how people can praise this hack if it's broken in the first level. Did you test it?
Also, why so many dark rooms?! What's the point?