Ok, that was freakin' awesome for a game-jam game. The music was spot-on amazing the whole way through.
SPOILERS AHEAD
The boss music really kicked it up a notch at just the right time. The interaction with the glitches in between levels got more and more involved and was pretty funny. Even when graphics were "failing" they looked super cool. Once you added the occasional small enemy that could dart at you fast, I felt like the combat was no longer a walk in the park. And then when the enemies started lagging, my anxiety shot up a ton (in a good way).
I wouldn't be surprised if you win the game jam!