I like the subject and angle you chose. It gives me the illusion that the left foot of the girl in the swing is about to step on (or kick) the small child. I wonder how this would look if you cropped up from the bottom to eliminate that illusion thereby eliminating the bike in the lower right hand side too? I think black and white works well for this shot.
Cute idea. This would be fantastic if you cropped to remove the people. I don't know how that would affect tthe wide-angle effect but would really add to the picture.