The idea that you grow with the weapons you pick up is quite interesting. I agree with the commenter below that extending player hitbox with the weapon is too much of a punishment. I feel itās enough that you are blocked from the certain passages and thus certain pickups.
I also think itās a good idea to add some more benefit to consuming a weapon. Maybe you regain hp when you do so. Because right now this mechanic feels punishing because you lose your source of damage, instead of feeling rewarding.
I like that thereās a variety of weapons, but I feel like there are a couple of really good once and most of the others feel underwhelming. So it becomes a matter of luck whether you can get a weapon that can consistently kill enemies.
Overall, itās a pretty fun game. Good job!