This is a nice little 5-minute diversion with a cool concept; it's a shame it's so short.
Anyway, here are my comments:
Click here to view the secret text
×Entrance - You can still complete the room without getting the answer right (although you'd need to be very new not to know it). Perhaps making a character appear in an inaccessible spot if the answer is wrong might be a way to fix this. Also, the central and west goblin are a bit odd - if you get the question wrong, neither turn into monsters, but the central one is not invincible, and if you do get it right, then the central goblin is still invincible.
1N - The puzzle is fine, although it's not really clear what you need to do; I had to look at the characters' scripts to see what was required. Maybe you should add some sort of statement or line to say that the player needs to reach a red square to complete the room.
1S - I quite like the binary puzzle, although it is possible to crack it without knowing the answer as you can see the orb effects on clicking them (I guess, though, that there's not much you can do about it).
1S 1E - The puzzle refers to the room as a "skip puzzle". "Warp room", which was the term used in KDD, I believe, might be slightly better. Also if you get it wrong, the correct answer is revealed, as the correct path's Slayer disappears. It might be better to have that turn into a monster as well if you guess wrong.
Also, the scripts and speech play again when you re-enter any of the rooms, so you might want to add "End" or "End on Room Exit" commands to your scripts if you don't want this to happen.
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Resident Medic/Mycologist