Looks great, including the animation. I agree though that the transition to the spinning animation is a bit odd though

The spinning animation feels much rougher/less polished than the standing animation. I think you should use some of the extra colours from the standing sprite to add internal AA to the spinning animation. It could also use some smoothing in the shapes, lots of jaggies going on.

Thanks for all the feedback Crafty :)

- I like the ball animation most, the transition wasn't really well made though x-x. -