Need more contrast to really make the subjects pop out of the picture. Playing with levels to darken the darks would really enhance this picture. A little sharpness would help also. Otherwise a fairly good composition.
This is a tough to get shot, I know from experience! Good composition. I have a few suggestions... you need to watch your compression, your file size is only 39k and so there are very visible compression artifacts in the image. This will affect your score dramatically. Also, I would suggest some color correction to reduce the strong blue cast, and increase contrast slightly.
I love the composition of this shot, the colors -- everything except I find the photo focus is too soft. If this were crisp, you'd rate in the top 5% with this photo.