Nice color, the composition is somewhat too rectilinear for my taste. Looks like a velodrome, seems like it is just begging to be photographed down low at track level, with an image capitalizing on the curve and pitch of the track.
I can tell the field is lined up properly but the rise of the background makes it feel "off" or odd in some way. I'd crop out a lot of the top area above the fence as well, since it doesn't add to the composition.
The most interesting aspect of this image (for me) is trying to determine what sport it represents. Not recognizing the layout of the field. Funny how the qualtity of light makes the green appear to shift in color as you look across the field. BTW, somebody needs to take the bottle away from that line painter! :D Good luck in the challenge.
Meets challenge well but with the bright lights on the field I think upping the saturation may have helped as the colours seem a bit washed out. Other than that I think this is nice and simple: 7
This is an interesting shot from a purely abstract point of view. The lines, shapes, and colors are intriguing. While this is obviously a playing field os some sort, though, I don't necessarily get a feeling for the story you are trying to tell about it.