Gday Cheyenne
Think the shack looks perfect in its environment.
Jays suggestion to age the weatherboards is a good idea
The tray roof looks good. The lifted sheet is a nice touch, but I think you would pretty much see straight through to outside the door or into room underneath... To have the roof in this dilapidated state, maybe have another small section hanging, like the capping at the edge of the roof? Age it a little to explain the disrepair of the roof? Just a suggestion
Cheers
Brad