Fun game! Like other people have said, it is an oddly satisfying game. I think a large part of it came down to nailing the music and sound designs. The physics is also very well tuned.
I also liked the fact that the level design is pretty well though out. You placed a lot of interesting stuffs to see at an appropriate amount of distance so there's always something to be distracted by every few steps. I enjoyed that feeling a lot.
Now maybe I'm in the minority here, but I actually didn't quite enjoy the visual style of the game that much. I like the vibrant color overall, but I find the post processing filter to be very busy and noisy. It does give the game a unique visual identity, but it also hinders my ability to concentrate on the game for an extended amount of time.
I would be interested in seeing the game being developed some more and the visual style gets more refined.