Nice oblique take on the challenge I didn't think of ... this one's certainly the best known, although I can think of a couple of other classics which would work well too.
Clever composition. The frame suits the image nicely. The only distraction for me is that it looks like the sharpening damaged some of the pixels in the lower third... the transition from light to dark grey looks a tad blotchy. You've done a nice job of fitting the challenge.
Leading lines, yes, but are they effective? they lead my eyes straight off the pictures edge swiftly. When the eye comes to the edge of the photo, the brain says "Done, next picture please" unless there is a counter line to draw the viewer back its over.