Doesn't quite meet its potential. Maybe a square crop would help--- taking out about a fourth on the left side. Then maybe some subtle dark vignetting to direct the attention to the brighter misty center of the picture. the color seems to be a little washed out. this is a difficult shot to make something really good out of since there is little form to work with.
An interesting effect here, but it doesn't work for me. I think it would be stronger with a lot more of the ghostly effect or none at all - just my .02 though.
I'm tempted to say this is subjectless, but based on your title, I suspect there are ghosts where it appears slightly blurry. As a photograph for a Free Study, it's different, but in the end, kind of subjectless and the score will most likely reflect that. Also, for whatever reason, I can see grids of pixelization, particularly over by the fence on the left, and a line that runs across the center of the picture horizontally. Not sure if this is something that happened in camera of in uploading.