Hey, Fabio. I got here kind of late, but I would like to make a couple of suggestions.
The bullet impacts in the water should have some corresponding ones in the sand ( easier said than done ) and the boxes of supplies and wooden posts.
Also, I would expect the palm tree fronds would be somewhat shredded as opposed to lying undamaged on the sand.
Hope this helps. Your talent is beyond me, but maybe my ideas will help.
"I lay like a small idea in a vacant mind" - Wm. Least Heat Moon
"I am at the center of the earth." - Black Elk
My FSM friends are the best.