Excellent cover art. I love the style of it. I also really dig your map. I'm a huge sucker for this style of map!
I really dig the big baddie at the end with the tentacle hair as well.
Room 2 appearing first as a simple room with a sand floor is really fun because I can just imagine players spending an absurd amount of time there thinking there must be more to it (which there technically is) and that's the sort of design that makes me really happy to run.
Also I learned a few new vocabulary words from this which is always great. Thanks for submitting this!