private void ChangeSelectionLeft(int index)
        {
            if (MENU_OPTIONS[index].Length > 2)
            {
                switch (index)
                {
                case 0:     // Text Speed
                    if (options.text_speed != TextSpeeds.Slow)
                    {
                        options.text_speed -= 1;
                    }
                    break;

                case 1:     // Battle Effects
                    if (options.battle_effect != BattleEffects.On)
                    {
                        options.battle_effect -= 1;
                    }
                    break;

                case 2:     // Battle Style
                    if (options.battle_style != BattleStyles.Switch)
                    {
                        options.battle_style -= 1;
                    }
                    break;

                default:
                    break;
                }
            }
            else
            {
                if (index == MESSAGE_FRAME_OPTION_INDEX)
                {
                    if (options.message_frame == 0)
                    {
                        options.message_frame = (MessageFrames)(Enum.GetValues(typeof(MessageFrames)).Length - 1);
                    }
                    else
                    {
                        options.message_frame -= 1;
                    }
                    message_panel.sprite     = ui_manager.GetMessageSkin(options.message_frame);
                    message_text_field.color = ui_manager.GetBestTextColor(message_panel);
                }
                else if (index == MENU_FRAME_OPTION_INDEX)
                {
                    if (options.menu_frame == 0)
                    {
                        options.menu_frame = (MenuFrames)(Enum.GetValues(typeof(MenuFrames)).Length - 1);
                    }
                    else
                    {
                        options.menu_frame -= 1;
                    }
                    title_panel.sprite                 = ui_manager.GetMenuSkin(options.menu_frame);
                    title_text_field.color             = ui_manager.GetBestTextColor(title_panel);
                    options_panel.sprite               = ui_manager.GetMenuSkin(options.menu_frame);
                    options_text_field.color           = ui_manager.GetBestTextColor(options_panel);
                    options_selection_text_field.color = ui_manager.GetBestTextColor(options_panel);
                }
            }

            BuildMenuText();
        }