Im at an impass...

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

import java.awt.Font;
/**
 * Write a description of class Points here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Points extends Actor
{
    private int value = 0;
    private int target = 0;
    private int stringLength;
    private String text;
    
    
    public Points()
    {
        this("");
    }
    
    
    public Points(String t)
    {
        text = t;
        stringLength = (text.length() + 2) * 16;
    
        setImage(new GreenfootImage(stringLength, 24));
        GreenfootImage image = getImage();
        Font font = image.getFont();
        image.setFont(font.deriveFont(24.0F));  // use larger font
        
        updateImage();
    }
   
    public void act(){
    
        if(value > target) {
            value++;
            updateImage();
        }
        else if(value > target) {
            value--;
            updateImage();
        }
      
    }
    
        public void add(int score)
    {
        target += score;
    }

    public void subtract(int score)
    {
        target -= score;
    }

    public int getValue()
    {
        return value;
    }
    
    
    
    /*
     * Make the image
     */
    private void updateImage()
    {
        GreenfootImage image = getImage();
        image.clear();
        image.drawString(text + value, 1, 18);
    }
}

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

/**
 * Write a description of class Dolphin here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Dolphin extends Actor
{
    private int urSpeed = 4;
    private Points counter;
    
    public Dolphin(Points pointCounter)
    {
        counter = pointCounter;
    }
    
    
    /**
     * Act - do whatever the Dolphin wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        moveAround();
        eatFish();
    }    
    
    
    /*
     * moveAround is just to move up down so 
     * on and so forth.
     */
    public void moveAround()
    {
        
        move(urSpeed);
        
        if( Greenfoot.isKeyDown("left"))
        {
            turn(-urSpeed);
        }
        
        if(Greenfoot.isKeyDown("right"))
        {
            turn(urSpeed);
        }
    }
    
    
    public void eatFish()
    {
    Actor[] fish = new Actor[5];
       
        //Make all the fish part of an array so i dont have to write if(fish!=null) so many times.
        //use a for statement to check em all quickly.
        fish[0] = getOneObjectAtOffset(5,5, BlueFish.class);
        fish[1] = getOneObjectAtOffset(5,5, GreenFish.class);
        fish[2] = getOneObjectAtOffset(5,5, OrangeFish.class);
        fish[3] = getOneObjectAtOffset(5,5, PurpleFish.class);
        fish[4] = getOneObjectAtOffset(5,5, RedFish.class);
        
        for (int i=0; i < fish.length; i++)
        {
            if (fish[i] != null)
            {
                World world;
                world = getWorld();
                world.removeObject(fish[i]);
                
               
                switch (i)
                {
                    case 0:
                        counter.add(1);
                        break;
                        
                    case 1:
                        counter.add(2);
                           break;
                           
                    case 2:
                        counter.add(3);
                           break;
                           
                    case 3: //If it is a purple fish it shall make the 
                            //dolphin faster.
                        counter.add(10);
                        urSpeed++;
                           break;
                           
                    case 4:
                        counter.add(5);
                           break;
                           
                    default:
                        counter.add(0);
                            break;
                }
            }
        }
    }
    
}

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.util.Random;
/**
 * Write a description of class UnderWater here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class UnderWater extends World
{
    Points Dpoints = new Points("Points: ");
    
    /**
     * Constructor for objects of class UnderWater.
     * 
     */
    public UnderWater()
    {    
        // Create a new world with 600x400 cells with a cell size of 1x1 pixels.
        super(1000, 600, 1);
        
        prepare();
    }
    
    public void act()
    {
       int fishNumber; //To hold a value for a random fish number
       
       fishNumber = Greenfoot.getRandomNumber(1500);
        //if statements to find out when to spawn.
        if ( fishNumber <= 20)
         addObject(new BlueFish(),Greenfoot.getRandomNumber(getWidth()),Greenfoot.getRandomNumber(getHeight()));     
        else if (fishNumber >= 21 && fishNumber <= 25)
            addObject(new GreenFish(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight()));
        else if (fishNumber >= 26 && fishNumber <= 29)
            addObject(new OrangeFish(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight()));
        else if (fishNumber >= 30 && fishNumber <= 33)
            addObject(new PurpleFish(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight()));
        else if (fishNumber >= 34 && fishNumber <= 36)
            addObject(new RedFish(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight()));
        else if (fishNumber == 666)
            addObject(new Shark(), 235, 368 );
    }
    
  
    
        private void prepare()
    {
       addObject(Dpoints, 100, 375);
       Dolphin d = new Dolphin(Dpoints);
       
       addObject(d, getWidth() / 2, getHeight() / 2); 
       
    }
}