Well as people have said, the background was something that really hurt you. I do think that the sheet, even wrinkled, was better than having a ton of even more distracting elements in the background.
The rainbow, wow, you did a great job with that. I never would have guessed that it was from a CD.
The pot at the bottom blends into the background a lot, so maybe having a bit of a more well-lit area down there would have helped.
Overall I thought that this was really creative and had a lot of potential. It made me smile when I came across it during voting because it's something happy and cheerful (a pot of gold, yay!) and you don't see images like this all the time.
Nice concept shot - but the image really does not work for a couple of reasons. First, the screen or fabric that is used is readily in view and we can see all the wrinkles and seams etc. By moving the 'pot of gold' farther away from the fabric and shooting it - you would avoid the harsh shadows. Second, the perspective does not really work - I think a lower angle for the shot would have worked better.