The music and aesthetic was very cool. It feels like a 3d version of Crypt of the Necrodancer which is what I assume you were going for here. A tutorial or some documentation on what is what and what each thing does would be hugely helpful. Also using an item causes my multiplier to go to zero? And using space causes the multiplier to increase? That doesn't feel intentional. And coins seem to be able to be picked up some times but not others. I couldn't figure out when I was allowed to pick things up and use items or not.

Overall it's a great start. I think a tutorial would be hugely helpful. Keep going on this.

Great job :)

I usually avoid rhythm games but I do like dungeon crawlers so that's the part I'm going to speak to.

You've got a really good base done here. I was a little confused what specifically caused me to take damage and how I was supposed to defeat the snails. I had a snail spawn in one of the hallways and I couldn't get passed it. I think adding in some weapons or other ways to fight the creatures would help. And use syncing to the rhythm to do more damage or something. I'd personally brighten up the walls of the rooms a bit just to give a better idea of the bound.

I really like your music, it's good for keeping the beat to.

All in all, I think you have a very good start here! Good luck from here!