Use Cases
UC01: MovePlayer
UC02: PunchEnemy
UC03: ThrowHead
UC04: SwingLimb
UC05: FireHeadMissile
UC06: DetachLimb
UC07: PauseGame
UC08: DropWeapon
UC09: StartSinglePlayerGame
UC10: StartTwoPlayerGame
UC11: QuitGame
UC12: ViewCredits
UC13: ResumeGame
UC14: RestartLevel
UC15: ExitToMainMenu
UC16: AdvanceCutscene