So from what I understood:
-The island (which is 20km²) is the playing field
-You have to run away from the zombies
-When you get caught by the money zombies, you're out of the game (and of money)
-Game continues until there are 5 people left on the field
I don't think I've read anything against going out of the field. So what happens if everyone (but 5 persons) goes out of the island? Would the ones to go outside be disqualified? If so, since you were technically not caught by the money zombies, is it still "all over"? Or would the game simply end since there is technically only 5 people left on the field?