I've watched a few people play this on stream and now I've played it myself as well.
I absolutely love the art, a big highlight is the crazy evil eternal evil in the sky but most of all I love the cave grubs <_< but all the art is great, the books, the tiles, the sprites, etc. The beginning cutscene was awesome and the kind of yawning void of the endless library once you get past the gate gives me very otherworldly dimension/liminal space vibes.
The games systems are also really interesting, the fact that each story has a unique world that crafts your character with skills and equipment, the stories changing once you fulfill the quest in the book, even without the overarching narrative I think it's such a cool concept. The wider story provides a really interesting narrative structure to what your doing as the librarian as well. Really cool.
I had a few bugs. Wasn't able to equip some stuff, I had the teleport bug, but not a big deal for a jam game, especially one with this breadth of content. I also wish I could drop items, but that's really about it.
Really well crafted entry, nice job!