The controls are good. But I cannot complete the game, at some point in the second area I get stuck between a box and a plank and I couldn't jump because I was in the air. Maybe you could define some checkpoint to be able to reset the player's position when something like that occurred. I don't mean that you should put a lot of checkpoints, but at least an option to reset the position at the beginning of the area could be fine. The alternative is modify the layaout to ensure that the holes are big enought to prevent ball stuck.
A part of this, the layout of the levels is good and at least in the beggining, the game feels fair and balanced, that those games usually are abusing of that to make the player rage