Numunuu is Comanche for "The People".
The Landlord's game, the board game which Pete's children were playing with, was the predecessor to Monopoly. The rationale of the game was to serve as a critique to capitalism: Exorbitant rents or monies were paid to the owners of said land, not because of the fruits of their labor but due to the fact that the land was in their possession. The developers of said game, hoped that the children who played the game would carry this feeling of unfairness into adulthood, and would act to change the system accordingly.