Well, the map is really nice. Not perfectly polished, but given the size it's nice... Now, the bad part - I'm stuck, I got the silver key, but I can't find the door. I only have a gold key door (and a crypt key door, of course, but that one I used it)...
And another bad thing. After I got the silver key, I can enter again through a passage and I'll get stuck there. There is a door that is opened by a switch near the door, I get in, the door closes, I go forward, there's another door, it won't open. If I try to go back, it also won't open. Quite ugly.
Too bad, the map has potential and, I repeat, it's nice looking. But (for me, at least) unplayable :(
Surprisely the First door on the castle's place down stairs has a trigger message that says "You need the silver key".