I had a lot of fun playing your game! I found myself on the edge of my seat while playing. I would have kept playing if you had more levels.
I liked a lot of the assets that you used or made. I did often find the background floor to be a bit distracting, however.
On theme, and audio was good. It was great to have a sound when you picked up a page or ran into an enemy. I think it would be worth experimenting with a "magic" sound when you pick up a scroll (if you haven't already).
Anyway, I'm a big fan and I'm excited to see what might be next.