I love the shading against the water. I guess this can be considered null since it's cartoony, but should there be some sort of cliff against the grass to the water to show a sense of height? It looks somewhat like puddles or small-dug shallow ditches...I'm not sure, but it's striking me as both strange and nice at the same time. By all means, I'm not suggesting you need to make the change or anything, but I'm throwing the idea out in case it should apply here.
So yeah, the result does look fabulous.
Hopefully your trees won't end up what I'm imagining them to be...xD