Cool! I like that camera angle much more!
I think the general idea is there and you have all the main poses in there. Now, before you start adding breakdowns and extremes I would think about his character and his emotions. Right now he's just going through the steps and mechanics of rolling the ball. What's missing is the state of mind. Character wise I would have to read him as robotic. There is no indication if he's enjoying himself, or if he's tired, cold, frustrated, in a hurry, etc. etc. What if he's tried to roll that thing up onto the body for the past two days? He could be really tired. And when the head falls on him, he could smash his fist into the ground because he's just so fed up with it.
Or he's really patient and after the head smash he's just tapping his fingers as in "Hmm... really? That shouldn't have happened.".
I hope that makes sense. The timing of how he pushes the ball, how he repositions himself will tell us something about his character and mood. Give the audience something to connect with.