That looks pretty good there, Quidproquo, and I have a suggestion for getting the depth you have in those pictures (that is, assuming you haven't already got it all worked out): You could use "layers" to acheive this effect, i.e. have a "background layer," this would have the background (obviously), have a "gameplay layer," which would be transparent except for the gameplay characters and such that would be in it, then have a "foreground layer," which would also be transparent, except for what you wanted in it. Then, you could have your trees and all that in the background layer, your characters in the gameplay layer, and the closer trees and that big rock and all that sort of stuff in the foreground layer.
Hmmm, this was a very long-winded post.