Nice shot, would love to know how many takes this took you? Maybe have blurred the background a little more and cropped it to remove the black thing (tree?) on the right
This is a really good composition but it's just too grainy and has too high of JPEG compression. I'm not sure if its your camera or if maybe you are using a software program that is resizing things funny. I'd try to shoot at the highest resolution possible, increase colour saturation wherever possible, and resize so that you don't lose a lot of image details.
IMO you should have cropped the right edge off. There also appears to be a lot of digital noise in the image. Maybe some post-processing sharpening would have helped.
Great idea but the picture is a bit noisy. A longer exposure might have been interesting as well. I think I might have cropped out the dark tree on the right hand side.