I got 610 before I started experimenting a little too much.
The art is so perfect, and it's extremely playable in general!
I feel like this could get very fun and chaotic if the speed of the drop ramped up as you played, increasing the difficulty until you're overwhelmed by silverfish. As it is, I only lost when I started seeing what happens when you try to burn books and help the silverfish. I like that you've got a nom sound effect if you stick a silverfish onto the bookshelf.