I really really loved this.
We had a similar kind of idea with waves and an upgrade system that comes with debuffs but went into a different direction theme wise, so I really liked seeing how you executed that. The visuals, the music, the gameplay like all of it is so good. Very nice shader also! We included one as well and it was my first time making one I wanted to cry xD.
Super polished entry, keep up the good work <3