members:
	private:
	GraphicsDeviceManager graphics
	ContentManager content
	
	const int DEFAULT_PLAYER_HEIGHT = 40
	
	Cue levelMusic1
	
	Renderer renderer
	Collision collision
	ObjectLibrary objectLibrary
	int numPlayers
	int numGamePads
	
functions:
	public GameFlow()
	protected override void Initialize(GraphicsDeviceManager graphics, ContentManager content)
	protected override void Update(GameTime gameTime)
	protected override void Draw(GameTime gameTime)