focus not perfect (tough with macro - use smaller aperture values to increase DoF) and sufferring from blown highlights (soften the lighting with some cloth in front of the lamp, or underexpose and play with curves & levels in PS).
This is a cool photo, but the reflection is hurting it. I recomend setting up a large piece of black posterboard and cutting a hole in it for your lens, or, failing that, just keep light off of you and the camera, that will do the trick as well.
Neat shot - the dust on top of the ball is a bit distracting... the glare in this shot is also a little rough. I like how you turned the circle with the 8 in it a bit away, so it's off-center and doesn't dominate the composition. - 7 - JeB