This piece of art is excellent. Choosing this background is the best choice. No other location (the beach) would be matching with her clothes' colors and skin. But there are only two things that didn't make this piece reach perfection : 1- The green color in her right arm. It's not matching with pink. 2- The left arm is darker than her body. Since it is cloudy .... I think there would be no shadow on top ( the left arm in this case).
One more thing .... I wish her lips were brighter.