I can't figue out how to open the locked door in the room with the tooth. Also, has anybody figured out the numbers on the doors? I haven't yet found any correlation.
It's been a while since I've played this game, but have you tried searching the prior help topics for this game to get your answer? Here are url's I've found.
http://www.adventuregamestudio.co.uk/yabb/index.php?topic=21182.0
http://www.adventuregamestudio.co.uk/yabb/index.php?topic=17421.0
http://www.adventuregamestudio.co.uk/yabb/index.php?topic=17353.0
http://www.adventuregamestudio.co.uk/yabb/index.php?topic=17372.0
It said to shoot the @-like symbol, but it wouldn't let me; clicking produced no results no matter where.