The design of using words as a ranged weapon is close to me - thank you for making a game based around it.
One minor error - "to go up to the TEN, heaven" <== TENth heaven
I think it would be better to make the books for levelling up appear where the enemies are falling. It seems to me that right now their placement is predetermined and the visibility is switched when the enemies of the level are cleared. Is that correct? It may be easy for the player to miss seeing when they appear. Or alternatively, maybe if you add some visual effect when they appear it would be easier to see them?
After the jam, you may consider making the ranged attacks controlled with the mouse - it results in more satisfying gameplay.
Good luck!