I like the concept and the art...and the fingerguns hahaha
I also like the enemies, the design is cool
My feedback is that I would've used the second mouse click to charge the attack instead of clicking multiple times and and think the game is a little too difficult, maybe spawning less enemies or increasing the damage the player makes or decreasing the cooldown of the charged attack would make it more balance.
Besides that...collecting the pages is unresponsive (?). I know I have to use E to pick a page but I don't know how close should I be to the tree or if I have to point at the page....even then sometimes I just don't pick it up. On that note, the counter for the pages I collected shows 0 but I can see the bar increasing.