Since they're all looking down into the water/sand, maybe to create a "story" of sorts it would be worth trying to overlay the original image of the people with a shell or something else that they could be seeing on the ground. Don't know. It's a good picture, but as a story it seems a bit confused.
Hmmm. So much good stuff here. I think I agree about the ghosting of the people. That seems a little odd. Also, I would just soften the areas where the images overlap. I like the birds, but maybe turn them gray, or even white? Also, perhaps add some depth with some grunge or clouds around the upper area, to break up the water. I like it as it is, but these are things that I might try.
I do like the concept-the flow is all wrong-the birds don't need to be in there and can you transition the family more smoothly from sand to surf ? Good to experiment & here is where you can get feedback
I think it's interesting, but the ghosting of the people seems a little strange... Have you tried masking that part out so they're not ghosts? Or did it look more interesting with them as ghosts? (just curious... :)
Between stone and water. A cool effect. What if you had an image of clouds to add to the top, dividing the image into three parts? Keep that lovely sepia.