Hey you 4, congrats on this submission for real.
I think the game has a really nice foundation, especially the audio design and music
I also liked the core idea, but I felt the pacing could be improved a bit, at the beginning it was fun and interesting, though after some time it started to feel slower and less engaging :(
I also wasn't sure if the boss was supposed to die that quickly, so maybe the balance could be adjusted a lil here.
Another thing that confused me was the elements change system, I think that having a more direct progression instead of random could make the gameplay feel clearer and make more sense with jam theme.
Overall, I see a lot of potential on this game, more upgrand, enemies and progression system can make this project grow into a really fun and bigger game, great job!