The photo seems slanted, though it looks like it woudln't have been able to be cropped straight. Maybe a different shooting angle could have helped. i do like the irony of the shot.
I have some doubt here. As personal opinion the photo securely meet the challenge, securely have a good composition and securely is an interesting image. I don't like the reflection in the glass, probably with a polarizer filter those reflections could be reduced and a better crop on the right clear the black near the border. 6