GameOver.java

import greenfoot.*;

public class GameOver extends World {
    private GreenfootSound gameOverSound;
    private ButtonMenu buttonMenu;
    private ButtonRetry buttonRetry;

    public GameOver() {
        super(700, 700, 1);
        setBackground(new GreenfootImage("GAME OVERR.png"));

        gameOverSound = new GreenfootSound("GAME OVER.mp3");
        gameOverSound.play();

        buttonMenu = new ButtonMenu(gameOverSound);
        buttonRetry = new ButtonRetry(gameOverSound);

        addObject(buttonMenu, 432, 630);
        addObject(buttonRetry, 275, 630);
    }

    public void stopped() {
        if (gameOverSound != null) gameOverSound.stop();
    }

    public void started() {
        if (gameOverSound != null && !gameOverSound.isPlaying()) gameOverSound.play();
    }
}