I like the layout, composition and colors. I'm not too fond of the uneven lighting and fuzzy edges. If things are fuzzy, I like to be able to tell the reason - and here I can't.
You have no idea how long I played around with colored paper clips trying to get something ready for the color challenge! I didn't manage anything but now that I see yours I ask myself why I didn't think of something like this. Good idea and composition. Why the extra space at the top tho?
You have color alright but it doesn't pop. The black background appears to soak up all of the light, maybe something different in the back would be good. Light is everything.