Game looks great, the vibe is on point, congrats on this!
I think it would be better to add a small tutorial, but once I understood the concept I could move forward a bit. My only issue was with obstacles that went to the side of the screen. Since I avoided all the obstacles before by scaling up, I expected to have my circle do the same with those 'side' obstacles, but my circle wouldn't move far away from the center. With a bit of polish it could be amazing!