Dude. Super cool game, you gotta get more players for this. What engine is this? No way to do some kind of Web-playable build?
I thought the polish was on point and the vibe was immaculate. I liked the tracks you chose and how the arrows would kind of bop their way into place. I was hoping to find a game in this jam where someone decided to play around with a musical scale, and I think you executed it quite well. I played each level more than once.
Okay, some other things. I got some "Perfect"s that I definitely don't think were actually perfect, so I'm not totally sure about the timing, but that may be me. I think the synth tone for the player could be a little richer, fuller, but I'm not enough of an audiophile to better explain than that.
So, I think the danger bars are interesting in how they block off the player, but I think ripping someone out of the level and the song is just a little too harsh, it doesn't fit with the rest of the chill vibe. Instead of negative reinforcement, I would suggest finding something positive for rewarding skilled play. As a couple examples for what I mean, perhaps hitting both ends perfectly shatters the bar with a cool effect and gives a generous score multiplier, or maybe you could slide down the bar from one end to the other hearing a unique synth while having to exit with the right timing for a solid score bonus. While running into its middle just breaks the score combo and doesn't let you move over to the other side. I'd remove health entirely.
Anyhow, I think this was a really cool project and is one that I would have frankly no idea how to put together myself. Well done, and I hope you get some more players in here soon. Keep rating games, most people oblige with an unspoken rule of ratings exchange. Wish you all the best in your game dev futures!