Very nice- I like how you obviously took the time to figure out what color would make brown :) *I know this from experimenting with lots of negatives myself!* :) this photograph makes a great negative image! :) *two thumbs up* :) beautiful shapes/composition, and light/dark spots! :) *one of my faves* :)
Clever little idea here. Probably bumps up a point for technique and process. I don't know how many people will get how you did it (I didn't so I inverted it in photoshop). I like that the shadow casts a glow.
This is by far the best image I've seen in the competiton. Intelligent use of shades and colors to create an ordinary image with surreal feeling. 10 from me.