Very nice! Love those rooms (and the top level), and beautiful job with the colours and border. I also really like the addition of the book and globe!

The only thing I would suggest is to reduce the width of the map. There's an awful lot of empty space that just doesn't look quite right. And maybe try using a different compass rose (that's considerably smaller). This one seems much too large and doesn't really match with the rest of the elements, IMO.

Other than that, terrific job!