Wow, what a cool idea! I can see how this is not DPC friendly in that it didn't score well. This is great thinking for a shot though. Perhaps the same idea but with more of a link between the two halves of the image.
Let's forget about that challenge, right? ;-) I think yours is an innovative, creative photograph. I like it. Challenges are sometimes way too limiting. At least, don't take it to heart...
This is a very odd double-exposure. My guess is that you are trying to make a statement about the contrasting environments (nature vs. industry). But I really don't get a sense of conflict that would underscore your message. Still an interesting technique though.