Great color and compsition. As with most likely most comments and voters, I would like to see it with a bit more DOF to ring the hand into sharper focus. A litle motion blur there also. Either more motion blur or none would work better to me.
Nice lighting and color. The only nit I have is that the first coin on the bottom either has no markings or is reflecting the light. Very innovative and well done.
Your hand looks a bit fuzzy. I'm guessing it was from a shutter speed a bit to slow to stop some slight motion, since it looks like it was the only thing not held in place. Nicely done, though, and a good choice of background color. I love shots done like this.