I like this photo, it has a nice interest in the fore-, mid and back-ground which leads you into the picture.
I like the way that you are lead into the haze centered around the middle and creates the mystery.
I would have liked a slightly sharper image on the fore/mid ground objects such as the tree - giving a sharper silhouette and contrast to the areas of light and dark.
The levels seems slightly flat, I wonder with slight levels adjustment more detail would have been shown.
Next time it might be fun doing a low iso, long exposure with a small aperture. Hopefully if the subject movement is not too great this will give a sharp image, with low noise and high dof.