Surprised I got through on my first run! I was down to one life at the end and got like 6 of those things in a row, avoiding the eyes.
I think the art and audio is super effective. The monsters look great, the sound is dynamic and engaging. The movement felt pretty good, too!
As it's been said, though, the game felt really short - I think I spent as much time in the book as I did in the normal level, and I do wish that pacing were different. The idea is so good, I want to stay in that world and travel further, encounter more monsters, etc. But it felt very rushed at the end, despite how well the game felt until that point.