As I said earlier, forum members will have priority over everybody else, but if anyone is worried about securing their entry then they just have to email me.
Those who have pre-ordered will automatically receive a pack, but some may not wish to enter.
Those who have opened all (or most) puzzles so far will likely have a place in the competition anyway, but I would like to think that if they were genuinely worried that they would not make the first 250 they would email/PM me earlier rather than later.
Obviously the end result needs to be practical... I mean if we received a design with a live hippopotamus pushing the pin to the end then it would not be considered.. I know this because that was my design
If you have an idea and want to check that it's physically possible then I'm sure Chris will be able to help to a certain extent. (as in "does this work?".. "yes".. Not as in "how can I do this?".. "Here is an idea" if that makes sense)
I think the winner will be chosen based on a number of things, but originality and entertainment value will probably be 2 major players!