Okay, so firstly, WOWZA!
Rhythm games are usually hard to get on point, even harder when it's a GameJam & have to fit it under a theme. On top of that deploying a Rhythm game on WebGL (people will say you're crazy) but you're definitely a mad lad. (the mad scientist who isn't afraid to take the risk & the leap)
The first game that I've given a 5/5 on creativity. One of things that really is bad experience for me is that there is no user-boarding in game & you have to figure out stuff by yourself which is frustrating in Jam Games. But this game definitely by-passed that. I picked it up easily even though it's a bit of a unique mechanic so I think it's safe to say that you put some thought into that.
This game is 'Easy to Learn, Hard to Master' type games where you can spend a lot of time mastering it & combo-ing your way to power! The music doesn't get tiring even after a while which is another great thing. The music elevates what is happening on the screen which is 'shooting' enemies ofc.
Simple. Precise. Concise.
Fun. Fresh. Addictive.
Congratulations on the game! :) Wish you all the best with the game!