Lets Talk Gamedesign.
Its cool that you were able to set your own controls. It was quite fun and the Game feel was very nice. The art style is simple, but does its job. I woulve personally dropped down the Post Processing and the Camera Shake a bit.
When playing coop i think this game would be a lot more fun, because i just focused on the right side and by collecting the falling stars i randomly collected bits on the left. Still liked it though!