Looks good, but the hill is a little flat with that shadow on it. You might want to give that some better lighting.
The grass could be intregated better with the background as well. You can do that by using the depth buffer and the compositor to add some aerial haze. Doesn’t have to be much, just a little bit to make it look like there’s not a huge cliff behind the grassy field
The haze could add even more definition to the hill as well (if you keep it behind the hill).
I’m also thinking it’s a bit empty…