the grass is acceptable, a bit upright, but okay. i'd care more about the trees. the "stretched" look has already been pointed out, i wanna add that they have no real structure. it looks like they consist of a stick with a green cotton dabber <wattebausch>. maybe you need to cut out some leave layers. another thing: trees, like rocks, only take effect in groups. single leaf trees will always look generic. place them in small groups of different sized trees, small woods.