This shot is so creative... good for you that you created this wonderful pot of gold! Also, this photos is very well photographed and I really love the colors, the crispness of the shot and the b/g - nicely done.
excellent idea!!! Two observations from me, the lighting washes away the colors of your rainbow and the reflection on the pot of gold is a distraction.
I like this picture a lot, just because it is so unique. I would have liked seeing it with a white background, lots of dark... the pink licorice looks a bit beaten up near the "pot of gold"
I like the use of candy to make the rainbow. The image is pretty well composed - maybe placing the pot a bit more to the right may help with the balance of the image. The thing that bothers me a bit is the harsh lighting - the harsh light on the candy seem to wash it out too much