Loved the atmosphere and look, especially the monster designs! Managing between the clue and map was a bit of a hassle, and the instructions at the beginning went by too fast.
A note aside from reviewing the game itself: My antivirus kept blocking the file and I had to make a security exception for it, which tends to happen with self-built exes since anything unknown is deemed suspicious by many antivirus programs. Since you're working with Game Maker, I recommend going through the few extra steps to make jam games browser-playable. Given how good this game looks, I bet this would have gotten a lot more comments and ratings that way.