Based on the screenshots, I've got to say that the water looks SO crisp and clear, giving quite a tropical vibe and rightly so, given the location. The sand looks like a mix of orange-yellow-gold, perhaps a shade of brown, Might I suggest adding small patches of slightly different shades of sand/dirt here and there to preack up the color a touch? One more idea would be to add wrecks in the water and beaches, as if to give the impression that one of the player's is a part of another wave, or "taking" losses from hidden artillery.

Thanks for the comment. I will take time to improve the map map with your suggestions .