This has potential to be a good shot, but to me, it is lacking in a couple of basic fundamental areas. I know the rules of composition are nothing more than guidelines and can be broken. Give this link a quick look. It may be of help to you in positioning your horizon or at least give you some options to consider.
//www.colorpilot.com/comp_rules.html
In this case, I think I would have cropped the sky completely out, or included it only if it would fill at least the top 1/3 of the photo. Then maybe a couple tweaks of brightness and contrast. I hope this has been helpful to you.
Argh! I can barely see the sunset! Had to go looking for it. And the dunes seem really washed out, even if they were in shadow. I'd like to see more sky; perhaps the red of the sunset gilding the fence posts. This image certainly meets the challenge and has a lot of potential with a re-take.
I really like this concept. I wonder if you could have included just a little bit more of the sky? To me the color of the ocean/sky in the background really compliments the bleak grey 'winter' of the sand and fence.