Super polished game! I love the attacks it feels super nice to play! The aesthetic and sounds are also fitting though I do wish the music doesn't restart every round. The puzzle element mixed with the beat-em-up genre is also super cool! Great work!
You could potentially make it like a high scoring roguelite-ish game where you have to get the highest score possible (kind of like megabonk, etc). I think that could be fun! Its definitely up to you though, there's so many options!