I would put some highlights on the water every now and then.
And now for something completely different:
Change the transition between the square tiles and the ground. The ground looks kinda like big stones to me. I can not tell if its stones or dry earth and the transition to the tiles looks just off. Also would i add some overhang to the roof, so that it goes over the actual walls, no one builds houses like that.
And last but not least, the arches on the windows are a tad overaaed and look blurry. That's it.
But i have to say i would enjoy this look in a game.