That's something quite original out there! A Rhythm-based combat system, congrats for this cool idea guys!
I've also like the musics used, the battle theme is catchy and also love the bestiary and the art of the characters and the dungeon as well. For some reasons, this game reminds me of "Dark Cloud" (the Ps2 Game) if it was a Rhythm Dungeon-Crawler instead of a A-RPG :).
It's a bit sad there's no sound effects at all when we block or attack, but maybe you did not have time to include it, 7 days goes really fast! I would also love to be able to skip the intro cutscene, or to move the dialogues faster. Every transitions take so much time to do.
Overall, it's not that bad, I like it actually. Congrats to your team!