The map is elegant and extremely thematic. Also, kudos to the artist for such evocative work! (luckily that character on the cover isn't there... I know my players...)
The 'Unworthy' condition is brilliant. At first, I thought it didn't do much, but the twist in Room 6 is going to be so much fun to run.
The Giant Snake is a fantastic threat, though I noticed it’s missing a stat block to run it effectively. Lastly, if I’m reading this correctly, the secret door slams shut once the artifact is stolen, making an easy escape impossible unless someone lands a brutal DC 18 STR check. I may think of reducing it, seems strange to have a passage they cannot use no matter what.