well, if you think you need soooo much crits, then tell us what you think is so wrong about it, and what exactly will be animated, an how.
The more we know about it, the better the crits.
what bugs ME the most about it, is that the separation from the far background to the close foreground is too harsh, it goes straight from a dark green to a dark purple, that kind of substracts to the realism, it even prevented me from noticing the beautiful (scanned then color reduced? looks like it may be...:p) sky. You should add a lot more green shades, and make the green get less and less saturated as it goes into the background while you make the hues bluer and bluer, so that in the end the leap to purple isnt as huge.
Also, the objects actually sticking out from the plains should get faded out too, it's a bit ugly how all of the far background trees are extremely simple, while the closer ones are so detailed. Make that more gradual too.
if you're out of ideas on how to do a landscape, maybe you can go to webshots.com and look for some pics in there.