Interesting ideas at play here, with the changing layout and the health/madness mechanics. The fact that there is an internal logic to the level changes is fantastic, because I was able to learn how the dungeon "behaves" which is really cool, as opposed to just random layout changes which would have been frustrating.
I will say that moment when you pick up the book and the music hits that kind of 80s power rock bass line starts going and the synth kicks in, is RAD.
I wasn't quite sure if I did the right thing to finish, I found what I think is the boss but I wasn't able to kill them before I died.
Some really cool ideas here, a good entry. Well done!