The rolling ball took the principles learnt from the bouncing ball a step further.
I found the main challenge with the rolling ball was the arc of movement and then the physics of the ball stopping – how it will stop and how quickly. Ko helped enormously with movement and the idea of taking movement beyond the finishing point before returning it to create a more natural feel.
I also found weight a lot more difficult to convey with this task, finding it easier to create small, lightweight balls than anything heavier.