Excellent cover.
The typeface has a lot of personality, but the lack of white space around words makes the adventure a little harder to parse than you probably want, given how clean and usable the text is otherwise.
Great plot, including the intrigue among the mole people.
I really like the map. Some of the letters showing where the body parts are located get lost in the pencil drawings, though, so I'd either move them all outside of the rooms, or change and maybe bold face the fonts.
This is another good adventure site to drop into a hex map with an open-ended adventure.