He has not announced any plans for a contest. I was just wondering whether there might be one sometime in the future. But I do not actually know.
Thank you Nicodemux, for being actively involved in this discussion. It could be quite hard to do this without your help and guidance. There are a few things I want to clear up about the map, and I know that the video isn't the best way to understand how the map would be played. So I will try to explain how some of your concerns may not be necessary. Most of the dead ends are instant and would not cause much frustration. What I mean by this is that you'd see you made the error and be able to turn around quite quickly, without wasting a lot of time. Also most of the dead ends have chests, which make them worth while. If there is still a concern I would have no problem making an updated version of the map.
On the EcoCityCraft twitter account, Andrew just announced that: "We will also soon be excepting Survival Game map submissions!" https://twitter.com/EcoCityCraft/status/359683062780542976 So there ya go! You can submit your labyrinth map soon!
I'm tempted to try to build my own Labyrinth, but I think annyonion will scratch my eyes out if I don't get our wedding Cathedral done sometime soon. She has a point though... I need to complete my current projects before I start on new ones. Also, I don't want to keep her waiting for the "big day" <3 annyonion