Over 100? I thought that would be as much as 20...
And I don't mean a different object for each room, but each part of a room, which can be duplicated. (a corner piece, a tunnel piece, border of a room, etc.)
Yea that's what I meant. You wouldn't think it would end up with that many pieces but it does. I guess it would only be about 20 or so if you made a simpler one that doesn't show where the doors are like in Super Metroid.