|*Hello from Sid and the Critique Club*
A simple image given extra quality.
As soon as this started to appear on my screen I actually uttered an ooh
it has instant appeal for me. As your commenters have stated it has a dreamy quality to it.
Your slow shutter speed and deliberate(?) movement during exposure has created a much more unique image that has an extra appeal all of its own. The vogue is so often for very long exposures turning the sea into a flat lake which, although it has its merits, has been way overdone of late, this is much more preferable. I like your composition with the child well off centre and looking in towards the rest of the frame, it works well.
There's not really anything I can add, it works for me, thanks, Sid