Start a 3 or 4 player game, you get one player, he gets the rest. That should even up the time you each spend actually playing. Also try some split flipper games (each of you control one flipper button simultaneously). Try all at once.. 1P=you, 2P-3P = mate, 4P=both of you. See who wins.. your P1, his P2+3 combined, or the split flipper game.