This is a really cool spin on the horde survival/bullet hell and breakout genres! It was pretty fun, but the music didn't really go anywhere. A good workaround for this is by basically cheating by add other instruments/loops that line up with the other loops as the level increases to match the intensity of the gameplay, a sort of dynamic music. They don't even need to be super long loops to be interesting, just a bit of variation to break up the monotony. I tried this in my game, and I've been getting some actually positive reviews about my music this jam as opposed to pretty much every game I made in the past having objectively really repetitive and bad music. Other than that, the idea is really creative and I enjoyed it a lot!
Edit: I'm glad you decided to submit this, even in its unfinished state. In the wise, probably paraphrased, words of someone on the Discord; "At the end of the day, you made something, and that's pretty jamn cool." I'm excited to see where this goes!