@Override
    public void keyReleased(KeyEvent event) {
        if (event.getKeyCode() == KeyEvent.VK_P)
            new PlayButtonCallback().invoke();
        else if (event.getKeyCode() == KeyEvent.VK_H)
            new HighScoresButtonCallback().invoke();
        else if (event.getKeyCode() == KeyEvent.VK_S)
            new SettingsButtonCallback().invoke();
        else if (event.getKeyCode() == KeyEvent.VK_Q)
            new QuitButtonCallback().invoke();
    }