public void gameOver()
{
    // whatever you want to do before stopping the scenario
    Greenfoot.stop();
}

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Main player. Gets controlled by user.
 * 
 * @author (Quinn Sapp) 
 * @version (5 July 2013)
 */
public class MainPlayer extends Animal
{
    private Counter counter;
    public MainPlayer(Counter pointCounter)
    {
        counter = pointCounter;
    }
    public void act()
    {
        checkKeyPress();
        lookForPoint();
        gameOver();
        checkNextLevel();
        checkNextLevel2();
        checkNextLevel3();
        checkNextLevel4();
        checkNextLevel5();
    }// end act
    public void checkKeyPress(){
        if (Greenfoot.isKeyDown("left")){
            turn(-4);
        }
        if (Greenfoot.isKeyDown("right")){
            turn(4);
        }
        if (Greenfoot.isKeyDown("up")){
            turn(4);
        }
        if (Greenfoot.isKeyDown("down")){
            turn(4);
        }
        if (Greenfoot.isKeyDown("space")){
            move(2);
        }
    }//end checkKeys
    public void lookForPoint(){
       if (canSee(Point.class)){
        eat(Point.class);
        counter.add(2);
        Greenfoot.playSound("au.wav");
       }
    public void gameOver(){
       if(counter.getValue() >= 80){
           gameOver();
           Greenfoot.stop();
        }
    } //end lookForPoint
  }
    public void checkNextLevel(){   
       if (getOneIntersectingObject(Finish.class) != null) {  
         //reached the end object;
         //start the new level;  
        Greenfoot.setWorld(new Level2());
   }  
  }//end MainPlayer Class
      public void checkNextLevel2(){   
       if (getOneIntersectingObject(Finish2.class) != null) {  
         //reached the end object;
         //start the new level;  
        Greenfoot.setWorld(new Level3());
   }  
  }
      public void checkNextLevel3(){   
       if (getOneIntersectingObject(Finish3.class) != null) {  
         //reached the end object;
         //start the new level;  
        Greenfoot.setWorld(new Level4());
   }  
  }
      public void checkNextLevel4(){   
       if (getOneIntersectingObject(Finish4.class) != null) {  
         //reached the end object;
         //start the new level;  
        Greenfoot.setWorld(new Level5());
   }  
  }
        public void checkNextLevel5(){   
       if (getOneIntersectingObject(Finish5.class) != null) {  
         //reached the end object;
         //start the new level;  
        Greenfoot.setWorld(new WINNER());
   }  
  }
}