So many ideas, thank you for the awesome feedback!!
I had a lot of fun designing and decorating a bunch of the levels, though I can't take credit for the music. It actually is one track that adds more layers & instruments the more you make mess/build the mess meter at the top of the screen, it's just that there's a very small amount of mess you have to make in the earlier levels that you don't notice it until later. But it's technically there from the beginning!
We did think of a few cool things that the catnip could actually do like zoomies, make the controls wobbly/reversed momentarily etc, but just didn't spend time on the right things in the end. Would love to continue working on this in the future though to tighten the loop and add more features like the ones you suggested 😁