5 - Nice scene/potential. Wish the horizon was straight. Perhaps (if possible) a slight variation in perspective/angle, to enable the island in the distance to not be obstructed by the globe. Compositionally (again, depending what is there to the left), perhaps placing the globe on the right side of the frame, using the 'path' as a leading line, may have also given this a little extra, who knows. Colors are nice. Nice and clean. Like the single cloud in the sky. edit:typo
Composition and colors are good. I also like the shadow cast on the sphere. I think I might have cloned out the small area of land in the distant horizon.
Horizon is a little tilted. Colors are great. I think I would have preferred a little different angle so that the land in view wasn't directly above the rock.
You have such a great subject to work with but the elements just aren't coming together. Your horizon is tilted a bit plus it runs right through the middle of your shot. Remeber the rules of thirds...it would really help your subject.