NinjaBrawl is a 2D game where two players play against each other and try to shoot each other down. The game ends when either one of the characters is shot down.
Player versus player is accomplished through a single player class, where separate instances of the player are created and given a unique id. They each have their own parameters, such as xStartPos, yStartPos, and faceDirection.
Each player has their own attacks, made each time the button is pressed, through CreateJS. The attack class creates a separate instance each time the button is pressed, in this case, a shuriken is created, unique to a player's id.