A short, but pleasant and pretty experience. It doesn't try to go for all that much, but what it does, it does pretty well. The atmosphere is nice, and seeing the particles move with the wind following your input is a very satisfying touch.
The only two suggestions I'd have, is that the boat doesn't actually tilt at all right now, which feels a bit odd, and that the wind sound is a bit too harsh, especially for such a gentle game as this.