The pic is way too small and is out of focus (I can tell even at this tiny size). You should have used more light and zoomed in to show only the yellow "squishie" :)
This definitely meets the 'yellow' challenge... the image is too small to be really effective in the competition... the viewer can't see the detail... - setzler
The photo is a bit small and also looks blurred. Perhaps you were working with a camera that doesn't do macro well though. Adding more light can also help since it reduces shutter open time - giving a sharper image often.
It needs to be bigger. Composition wise, I think it would have been more interesting without that blue. Get much much closer so the viewer is more sure of what your subject is.
Why did you make the photo so small? You could have increased your score a lot more if you had used the maximum size of 640. Having it so small makes it difficult to see the details.