Nice and clean layout, and good artwork that gets the vibe across well. Fun concept, which should easily slot into most campaigns with some fun monsters! The central concept with the soulspores and the hazard die is a really nice touch and the theme is solidly built and used in the adventure. The font is sized well, room keys are well sized, just the right balance of information and terseness. I think it's a bit hard to tell which items, monsters and features are linked based on looking, maybe highlight or bold them so they are a bit more obvious. Aside from that, it looks awesome!