This was a really fun and peaceful experience, I played about 7 levels of it before moving on. If you had the interest to build on it after the jam I think your core concept is really strong for a "full" game. Great art style too!
Thanks so much for your kind words. I do plan to expand on the idea with some color mixing mechanics. Stay tuned. Glad you like the art style because it's all done with the Line Renderer tool and some math. There are no proper art assets anywhere and I'm quite proud of how it turned out. :)