Good job! If you believe you have a problem with the colors, it might be simply too little definition between the far shore/the water/the horizon line. Did you create this in Bryce? If so, I wish I knew how you did it...I still haven't figured out how to use mine. :D
Agree with Mary, a liitle more contrast would be nice in the background and little if no effect on the foreground tree. I really like the dock and the reflections from the opposite shore...good job!