I hate to be picky.

I mean, the shadowing and such is great.

But you have two different sets of lighting - you have some lighting coming from the top, in order to create the shadow at the bottom as it is. You also have lighting coming from the north-west direction for the shadow on the ball on the bottom right hand - middle of the ball, if that makes sense?

I think it's good, but that one thing would be irritating.

But nice for some practice I guess!

Keep it up.