This is from a tutorial but rather loosely. I still need to add grass and maybe some colors. I think the prominent tree needs to hide the branches a little and the proportions are way off. What do you think?
If you are striving for realism I think making the leaf part of the trees a bit less oval and more random shape would give the picture more character.....but I have seen some great works with only symmetrical shapes so it might be stylized artistic license. At any rate, I would definitely cover bits of the branches with leaves.