I love your compositon, and the lighting is superb. You took a commonly photographed subject and made it work very well. But I noticed in fullscreen there's alot of noise...maybe taking the picture with a slower ISO or reparing it with Neat Image would help. But, a wonderful photo, thanks for submitting.
I like the darkness, and it would also be interresting to hit that side with more light on the balls only to extend those shadows. Good depth in the composition