@Override
    public Status execute(String command) throws MenuException {
        switch (command) {
            case "E":
                difficulty = "E";
                break;
            case "M":
                difficulty = "M";
                break;
            case "H":
                difficulty = "H";
                break;

            default:
                throw new MenuException(NEW_GAME);

        }
        return PLAYING;

    }