Lol. Actually. I don't quite get this.

I think that it's overly simplistic, but it doesn't feel like it has any point to it to be that simple. More to the point, I think you're making it simple just so that it could be simple.

It's okay, but to me, it looks too ... 2-dimensionalish. There's not quite enough highlighting and shadows to look 3-d, but too much to be truly 2-d, yet the effect still seems 2-d.

I think this might be because of the ripples. They don't go around to her back, which makes it seem like she could also be lying on the water. Also, the ripples for her arm are pointed in a different direction. This just doesn't feel right, somehow.

Congrats on the work, but I think that you need to rethink the concept again. I understand that you're saying that this is completely random, so... if I could classify this, I'd say it were something similar to "artistic spam."

Lovely, clean wallpapers is the best material for desktops! Great work on this one. Love the mild tone of the water. Excellent detail with the little paper boat.
Keep up the good work!