Try to make your photo at least 640 pixels on the long side. You will lose points in these challenges if your picture is too small to properly evaluate.
There is a helpful tutorial for resizing in the "Learn" section.
Nice idea for a shapes challenge, but the image is too small to be viewed adequately, and you lose impact because of it.
You can post images up to 640 pixels on the larger dimension.
Larger images are easier to judge. I like the composition on this one and the black and white works, but it is hard to tell if the focus is sharp at this size.
Interesting photo. I myself have found taking photos of CDs very frustrating, because of the light reflections, but you've handled those well. I wish the CDs had been clean and unscratched, though, because it's distracting, especially on the first CD.