This looks very good, has a Japanese feel to it.
My only critique would be about the trees. The type of trees look out of place, maybe something more to these:
-
Big city tree
http://transportblog.co.nz/wp-content/uploads/2012/10/CTY-TREES_5898.jpg -
Sidewalk small tree
http://www.el-cerrito.org/images/pages/N463/tree1.jpg
btw is this going to be a game?