What are the pillars? They're a little too geometrical to be rocks. The grass looks better, but it's not quite what I was thinking of. I'll do an edit when I get the chance.
The fad avatar looks great. I expected the glasses to be a little more shaded on top, since they're under the hair, so the ended up looking a bit bright. Not sure what I think of the blue green version. It doesn't feel as cohesive as the orange.
Edit: As promised, here's the edit. I toned down the hue shifting a bit on the grass. Hue shifting is nice, but it made the grass stand out. You need it to be grass, not call attention to itself. I also did a very quick, dirty, and overly symetrical edit to your tree to show a way you could add dimention to it and get rid of those splotches. Leaves tend to grow in clumps so sometimes it helps to start with a bunch of random sphere shapes and shade based from that. Also, because of the way a tree grows, it tends to have more leaves at the bottom. Hope this helps. If I haven't said it before, I love the texture of grass and dirt, very well done.
