real interesting rocks in your shoes....... a great composition idea, "more pixals please" as has been mentioned before about not utilizing full 640x format might be a suggestion.
Complementary colours are pairs of opposite colours that contrast strongly when compared to each other. The challenge called for two complementary colors to compose your photograph, but in your photo you have used red and yellow as your only colours on a neutral background, and they don't give the effect of tones of a single predominating colour against tones of its opposite or complementary colour.
This is a great study of an unusual juxtaposition of objects. But I think your submission would have been a demonstration of complementary colours if, in the same scene, you had shot a blue pump instead of a red one. Then, you would have had a complementary pair of yellow/blue, and a striking image as well.
Nevertheless, I enjoy your vision and the way that you have portrayed texture in this image! In another challenge, this would have been a great submission.
Interesting picture. I don't see complementary colors here but seems like you are trying to make a statement. Love that red shade against the pavement.