Interesting shot. The sky looks a little out of whack in the top right corner (very yellowish) - was this due to post processing? Not sure if this was intented, but to me it detracts from the picture.
Good contrast. Is that a lens flare in the upper left? Whatever it is, it sticks out. I can't help feeling like I need to lean to the left to enjoy this one.
The angle of the photo is not very appealing. Perhaps a 2-4 degree rotation CW would have made for a more appealing shot. I also find the building to be lacking subject/body. there is also a hotspot on the left side of the shack that I find very distracting. Good luck with this challenge.