Wow this is a slick little package. Well done to the team!
The dynamically building music is an excellent match to the difficulty progression. I kept going less for the game and more to just see what the next layer of instrumentation was going to be. I think my favorite had to be the 4th with that funky jazz gnome. Can I get a version that's just 5 of him please?
The game play felt a little too fluid and wobbly. But that's probably me just being bad at these types of game. I got a little frustrated not being able to fullscreen, because I kept clicking out of the window onto my taskbar. Some of the button/switch combos felt a little rude, too. Not seeing one and having to backtrack and then re-tread didn't feel great. But it's quick enough.
Unfortunately, in the 3rd section, I got shunted under a pinball bumper and got stuck. No reset or way to unstuck, I was forced to refresh and lose my progress. I couldn't bring myself to replay all that just because it's not quite my thing. But at least I didn't have to witness your end-credits bug that you warned of!
Overall, great job! I hope lots of eyes get to see this, because it's a really pretty and stylish jam game!