public void mainMenu() {
        System.out.println("Do you want to save a profile or start a test? SaP = Save StT = Start");
        String choice = "";
        try {
            choice = cache.readLine();
        } catch (IOException ex) {
            System.out.println(ex.getMessage());
            System.exit(-1);
        }
        choice = choice.toLowerCase();
        switch (choice) {
            case "sap":
                this.saveGame();
                break;
            case "stt":
                this.startGame();
                break;
        }
    }