Great job! A pretty shot, although corners seem to be a little blackened. Maybe that is your intent, I don't know. Pretty colors, but seems to be a little lackluster. In addition, a water shot, or even a shoreline shot, does not always mean 'beach' in my opinion. And meeting the challenge, to me, is the first and most important thing, if that isn't done, then anything else is unimportant. Doesn't mean it's not a beautiful and creative shot, because in this case, it absolutely is! I do love it! I went back and forth on how to score your pic, but I do vote low for those that I don't think meet the challenge, so to be consistant, I am voting this lower than I want for the reasons stated above.
Might have worked better if the tree was included more and the jetty did not end in the centre of the shot. As is, it looks unbalanced and heavy on the right hand side. Would only need a slight change of focus to correct.