This may not look like a 10-liner but it is in fact two games in one. Both games use the same main code for the unusual character movements. Each of these games requires two players.
In the football game you must guide the ball into the opponent's net. This is not as simple as it sounds because the players move as though they are on ice. The second game is 'tag'. The player who is flashing is it and must touch the other player to pass it on.