The game controller is used by the entire league.

The game controller is part of the small size league’s goal of zero human input from competing teams during a game. The game controller is a simple program that lets a neutral third-party operator (not a member of one of the playing teams) send the orders spoken by the referee directly to the teams’ software over a network, eliminating the need for teams to touch their computers to input those orders. In addition to simply sending commands, the referee box also acts as a helper utility for the referee by tracking time on the game clock, timeouts available to teams, goals scored, and yellow and red cards.