I like that the flower grows throughout the adventure, it gives it a sense of urgency and makes the world more alive, especially as it starts growing over doors and poking through stones.
It was a great idea including both the "Minor" and "Major" resolution options. Is the "DTF" in the Necromantis intended to indicate that it's horny? Speaking of Necromantis, the artwork is great, it's perfectly disturbing - it would look awesome on the cover too.
I liked the map you drew, it was helpful to keep track of the room layout.
I haven't printed it out, but I think the scissor section at the bottom is intended to keep the Overgrowth bar visible no matter what page you're on after it? Great idea!