Beautifull colours!!! I really love the sky. What you should work more (my honest opinion) is the boat fading and the building on the back (i think is an ancient greek building) it should be not too dark. Imagine there is the atmosphere in the middle which makes the shadows (and colours) less powerfull. Anyway it is very good job.
wow! this is absolutely stunning! the colour evokes so much emotion... i think it would work very well in a landscape orientation too! if you cropped out some of the sky at the top...(only because that's what fits on my screen, and it looks gorgeous that way too) well done on this one!