Fun game! The central game mechanic - "You're in a confusing map samey looking map, but there are maps dotted around, but you need to look at them fast because you're being chased", is executed pretty much perfectly.
I'd be interested to see a version where the pages are ticked off on the map once you got them. It would be easier... not necessarily better or worse game, I'm just curious.
Stuff to work on obviously is polish (which is especially important for games like these).
You could look at:
A more intentional colour scheme
More dynamic lighting (not moving lights, but with creative shadows etc)
Texture/model work
Blenderman animations
Some like camera shake, or add a view model that moves.
You could look at our game for some inspiration I think ;) ;) ;). (I'm not saying that to everyone I promise - I think genuinely it could be interesting for you in particular)