As mentioned earlier, the sunset looks great. There's not really much I can say now, about the mountains, as they're just the lines for them...um, they look like they'll work.
I'm confused a bit by that patch of green. I think I spot a shrub of some sort...is it going to be along the lines of a jungle or something?
Also, I have one small crit on the bridge...I personally would say the bridge would go over the grass, not the otherway around, I guess I'll see when it's colored.
Good luck!