I really respect the detailed explanations in your devlog and game page as to the inspirations for your game and things that are important to you.
It was really useful for other devs to see the advantage of using pre-made assets, making it possible to still work solo in a game jam and have a game that looks as great as yours.
I really can't say I've played anything like this before - and thats one of the great things with gamejams is that you get a chance to be creative and make some memories! A few bits of gameplay feedback - mainly the music mini game - I think this was an asset as you said but would be great if there was better feedback if you hit a note and the score colour was easier to see about the backdrop.