It says that your photos are OK to edit; so I just wanted to show what a difference I personally think it makes to straighten the horizon. (took me about 20 seconds total)
I love the photo very much.
It was nothing really done here... only black and white conversion (because I don't like the pink tint to the sky and this washed out colours) and I tightened the crop to concentrate the viewer on this boy. there was too much sky in my opinion. but i like the concept. It gives the feeling of a lonely person out there... one lonely and small boy agains huge and dangerous sea