I was able to get the hang of the controls eventually, but it never really felt like the ball was rolling 'towards' the cursor. I think maybe if you had in invisible plane at the same height as the ball and raycasted into that to get the point the ball would roll towards it would've worked better.
I liked the difficulty curve of this game. They way that each level ramped up felt natural and the difficulty always felt about right for how far into the game I was.