Is anybody familiar with the simulation game featured in the documentary World Peace and Other 4th Grade Achievements?

I just learned about this from a TED talk. Here is a shorter version, which is a trailer for the documentary. If both of these are too long for you, here is a brief summary. John Hunter is a fourth grade teacher, who has created a simulation game for relations between nations. The object is for all countries to come out ahead, which apparently the students are able to consistently achieve by the end of the school term.

It all seems impressive, but it also seems a little too good to be true. Pardon my skepticism. I would really like more details about the simulation game. I visited the Web site associated with the program, but there were no details.

Here are some of the things I would like to know.
What are the basic rules of the game and how complicated is it?

John Hunter has been using this simulation game for 30 years. Is it being used in any other schools?

Does the game encourage development of language and mathematical skills?

Can the game be extended to simulations from other periods in history?

I might be mistaken, but I believe that the class is for gifted students. If so, can the game be played by classes of ordinary students?