I think you were robbed on this shot. You should have scored much higher! I'd be interested in knowing your technique to get the different colors on each side.
Nice psychadelic colors and great concept that was done very well. I like that you can see some texture in the metal arm and cartridge, I just find the background to be distracting and think it should have been either completely black or blurred even more than it is. The yellow from the right is a bit too hot and should have been toned down as well. Overall I find it creative and I like it.
You know, I stared at this for along time wondering "how did he keep it so steady for a long exposure?" until I realized the record wasn't turning. Good shot.