Thanks so much for the feedback. Yes, I will adjust the controls after the jam so it's easier to keep the ball's momentum, that should help a lot.
I actually tested using mouse and trackpad and in my case the difficulty felt similar, but then I tried a friend's cheap mouse and it actually felt a bit easier, so I think it really depends on device and sensitivity.
It might also be worth adding a calibration screen, or making it so larger circles move the wheel faster, or adding a difficulty selection. I implemented the controls because I thought it was a funny idea, it's a lot more nuanced that I was expecting. It's just that in a short Jam I didn't have time to properly refine it.