/// <summary>
        /// The main menu was clicked, perform the button's action.
        /// </summary>
        /// <param name="button">the button pressed</param>
        private static void PerformMainMenuAction(int button)
        {
            switch (button)
            {
            case MAIN_MENU_PLAY_BUTTON:
                GameController.StartGame();
                break;

            case MAIN_MENU_SETUP_BUTTON:
                GameController.AddNewState(GameState.AlteringSettings);
                break;

            case MAIN_MENU_TOP_SCORES_BUTTON:
                GameController.AddNewState(GameState.ViewingHighScores);
                break;

            case MAIN_MENU_HELP_BUTTON:
                GameController.AddNewState(GameState.Help);
                break;

            case MAIN_MENU_FULLSCREEN_BUTTON:
                SwinGame.ToggleFullScreen();
                break;

            case MAIN_MENU_AUDIO_BUTTON:
                GameController.SwitchAudio();
                break;

            case MAIN_MENU_QUIT_BUTTON:
                GameController.EndCurrentState();
                break;
            }
        }