Great, great, great atmosphere. I didn't know about the nopperabou and was delighted to discover that under that shape (so to speak). It was as funny as it was spooky, and I even chanced upon some interesting moral discourse, which I didn't expect! Had the same trouble with the guessing puzzle as the others, but in retrospect it is not that difficult (though the first word should optional).
Great work! Now to play that Goose Game...