Composition is good but not as fond of the post processing, image is way too flat contrast wise for my taste, you could have had some texture in the sky as well and the white balance too blue for my taste. Not bad though, keep it up :)
Back to comment: A very lovely scene you have captured and the composition is nicely done. It looks like your image could have used a bit more sharpening after downsizing for the challenge. Most members use Unsharp Mask with a radius of one for this purpose. For my taste, this image could also use a bit more contrast and maybe a slight boost to the saturation. Please send me a PM if you have any questions regarding these comments. Again, nicely done. 6
It looks like there's too much going on in this. I keep looking at the rock in the fore ground, then the beach in the middle, then the lighthouse. I think that it's cool how it draws your attention to the lighthouse, but the viewer doesn't pay attention to one thing. They miss the texture on the rock or the movement of the waves.
blueish tint too cold and overdone for my. going lower and capturing the pebbles rather than the big rocks on the foreground would have been a more interesting shot. nice subject-matter
Gorgeous beach. I like the cool colors on this. I wish the sky were a little bit darker because it seems like you have some pretty clouds up there that would improve the image. Good job.