Enjoyed playing this game! Quite a simple chill out type of game which I do enjoy, the visuals are very pretty because of the minimalism!
I do have a couple suggestions to improve on this idea:
I believe there could room for improvement by adding different movement patterns for the comets to dodge, but also recommend making the comet hitboxes more visible. I also believe have a better indicator of your movement could be useful, something like adding a more varied background would help with that!
Overall good game!