Tom, I vote for the composition as-is. If you really wanted to correct the very slight "sidewalk-tilt" (for those "perpindicular people"), it would be at the expense of disrupting the pleasing parallelism of the downspout-verticals with the sides of the photograph(frame). (Then what would the "parallel people" think?)(posted 8821 days ago)Re. left-side cropping; the implied forward (leftward) motion and swinging arms and legs need some room. I wouldn't "jam" the kid further into the frame, just to even-out the right-left downspout-to-border spaces. (my apologies to the "symmetry people" :-)
I say you got it RIGHT!!
Larry