Initial Impresssions: Fits the challenge very well, though it just lacks that extra something.
Composition: I think you "started" off strong. The pieces of wood below make a good leading line. From there it gets a bit haphazard in placement resulting in a photo that isn't pulled together. The frame needs to be better filled. There is just too much space where things are not working. I like the idea of the green plant, but I think it needs to be repositioned. The idea of the two tone, green and off-white is great. I just think it needs to be more realized.
Technicals: Overall this is the strongest suit. Not sure if I understand the contrast/brightness settings you did in post. If anything I think it might be just a tad too dark. This is just a personal thing, exposure it pretty spot on. Sharpness is good. Depth of Field is good here as most everything is in focus. Techincally the photo is quite strong.
Possible Suggestions: Try a different angle. You are kind of looking down on the photo, which is sort of distoring the lines. Not sure how many shots you took, but maybe try a few more with different angles. Try removing some unneeded elements in the photo, the brooms, the bench. The bench might be okay if moved to a different location so you can see the whole thing. Maybe move some of the pieces of wood a bit. Might try the photo at another time of the day, without the back light or try to minimize that. I personally think the problem is the placement of all the items in the frame. If you change things up this photo would be greatly improved. Experiment with the canvas.
Overall: I terrific idea which has pretty good technicals, but is ultimately lacking in composition (setup) to fully realize the potential.
Can't help thinking that the maze of angles and lines you had available here might have made fro an interesting composition: this seems like a standard viewpoint, snapshot.
Looking at the condition, I'd say this definitely qualifies! Rot *and* breakage! Good job! I'll let you decide whether to be complimented or offended! 8>)