Just started and I already know what to pay attention for, imo you should find a way to hide that or put it through rot13/any decoder so that people who don't want help won't accidently spoil theirselves.
Just finished the game, its well designed and I think its clever that you cant go back up levels and that theres different sounds for when you get the room right or not, what bothers me though is the fact you dont get to know what was wrong. Overall its a well designed game :)