This is a simple 1 vs 1 game using mini nets and therefore no goalies are required. The only variation with this game is that the coach may have multiple games going on at once. Therefore, players need to be aware of their surroundings and play with their head up. As opposed to a normal 1 on 1 game where you know there is only 1 other player on the ice and therefore you don't need to pay as much attention to your surroundings. It is up to the coach to decide how many games to allow at one time.
Just let players play and encourage them to compete hard.
Credit: Diagram was produced using Hockey Coach Vision