I like the idea, and the image in general. The grunge is a nice touch, although maybe a little too much.
My main concern would be those fireflies and the time it took to render for such relatively small resolution… How is your glass setup? (make it transparent for shadow and diffuse pass) is the color value 1? Maybe there is some problem with the grass, or you could make the trees just a png cutout… (I assume it is a model) anyway you should probably optimize a little. Do you use clamping?
Also, to me the relatively bright sky does not seem to match rather a dark image. Or maybe the shadows are too purple, I am not sure, something about the lighting throws me off.
Also, I would consider adding some small detail, to support the idea and make it a little mor interesting. Maybe one last cardboard box of stuff to move, some forgotten object, something to catch a viewers eye…
You could think about some outdoor lights. Not necesarry on, but there would probably be some way to illuminate the path if anyone lived there.
other than that I think it is a good work, share when you re-render.