This was pretty fun! It reminded me of this old PS2 game I used to play with a pretty similar concept called "Monster Lab". I had a lot of fun with this one, even if there were a few bugs here and there. 4th boss was missing, and beating the 5th seems to freeze the game (so I assume they are the final) but I had a good time! The Music was great, the art was nice, and the game's gimmick was fun enough to make me want to do multiple runs! Love the secret rare arms that can spawn too! Pijhon is probably my fav.
Good work!