Amazing premise, execution, layout, art, title, cover, and vibes. And your application of the Hex Flower system was perfect, this is exactly the sort of thing it's best for! If my Dolmenwood players ever eat dubious mushrooms (or if I just wanna run this as a standalone) it's gonna be a blast!
Also, for the multi-part Weird Creatures table, I love that there's technically a 1/1,728 chance of each one just being a Greg. Greg is truly everywhere.