HELP ASAP

import greenfoot.*;
public class MyWorld extends World
{
    int count;
    int spawnSpeed = 50;
    int randomSpawn;    
    int wave = 1;    
    int pause;
    public Player mainPlayer = new Player();
    Counter counter = new Counter();
    HealthBar Healthbar = new HealthBar(mainPlayer);
    WeaponButton weaponButton = new WeaponButton(counter);
    button button = new button();
    SuperPower superPower = new SuperPower();
    public MyWorld()
    {
        super(1000, 800, 1);
        mainPlayer = new Player(weaponButton, superPower);
        addObject(button,976,25);
        addObject(mainPlayer,getWidth()/2, getHeight()/2);
        addObject(counter,96,70);
        addObject(Healthbar, mainPlayer.getX()-5, mainPlayer.getY()-50);
        addObject(weaponButton, 900, 100);
        addObject(superPower, mainPlayer.getX()+10, mainPlayer.getY()-80);
        
    }
    public Player getPlayer()
    {
        return mainPlayer;
    }
    public void act(){
        count++;
        spawnZombies();
        decreaseSpawnSpeed();
    }
    public void spawnZombies(){
        if(count % spawnSpeed == 0){
            randomSpawn = Greenfoot.getRandomNumber(8);
            switch(randomSpawn){
                case 0 : addObject(new Zombie(mainPlayer, counter), 0,0); break;
                case 1 : addObject(new Zombie(mainPlayer, counter), getWidth()/2,0); break;
                case 2 : addObject(new Zombie(mainPlayer, counter), getWidth(),0); break;
                case 3 : addObject(new Zombie(mainPlayer, counter), 0,getHeight()/2); break;
                case 4 : addObject(new Zombie(mainPlayer, counter), getWidth(),getHeight()/2); break;
                case 5 : addObject(new Zombie(mainPlayer, counter), 0,getHeight()); break;
                case 6 : addObject(new Zombie(mainPlayer, counter), getWidth()/2,getHeight()); break;
                case 7 : addObject(new Zombie(mainPlayer, counter), getWidth(),getHeight()); break;
            }                
        }
    }
    public void decreaseSpawnSpeed(){
        if(count % 600 == 0)
        {
            spawnSpeed--;
        }
    }
}
import greenfoot.*;
public class HealthBar extends Actor
{
    int health = 50;
    double specificHealth = (double)health;
    Player mainPlayer;
    Zombie zombie;
    public HealthBar(Player mainPlayer)
    {
        this.mainPlayer = mainPlayer;
        createImage(); 
    }
    public void act() 
    {
        createImage();           
        World world = getWorld();
        MyWorld game = (MyWorld)world;
        setLocation(game.getPlayer().getX() - 5, game.getPlayer().getY() - 50);
        LoseHealth();
    }
    public void createImage()
    {
        setImage(new GreenfootImage(52,12));
        getImage().drawRect(0,0,51,11);
        getImage().setColor(Color.RED);
        getImage().fillRect(1,1,health,10);
        health--;
    }
    public void LoseHealth()
    {
        World world = getWorld();
        MyWorld game = (MyWorld)world;
        
        if (game.getPlayer().hitByZombie() && zombie != null && getNeighbours(getImage().getWidth()/2, false, Zombie.class).contains(zombie) && zombie.hitsPlayer(mainPlayer))
        {
            health--;
        }
    }
}
import greenfoot.*;
import greenfoot.MouseInfo;

public class Player extends Actor
{
    // all the variables for the players stats
    Counter counter;
    Zombie zombie;
    public final int speed = 3;
    public int firerate = 10;
    int health = 100;
    int stamina = 10;
    int cash = 0;
    int wave = 1;
    int ammo = 20;
    int superTimer;

    public int pause = 100;
    int kills = 0;
    int survivedTime = 0;
    private boolean reloadKeyDown = false;
    int time = 0;
    private final int reloadTime = 10,
    maxShots = 30; 
    private int reloadTimer = 0,
    shotsLeft = maxShots; 
    private boolean shooting = false;
    boolean farthest = false;
    WeaponButton weaponButton;
    SuperPower superPower;
    /* BY GARRETT*/

    // creates the player character
    public Player(){
        setImage(new GreenfootImage(70, 50));
        getImage().setColor(Color.YELLOW);
        getImage().fillOval(0, 0, 50, 50);
        getImage().setColor(Color.BLACK);
        getImage().fillRect(50, 20, 70, 10);
    }

    public Player(WeaponButton weaponButton, SuperPower superPower){
        this.superPower = superPower;
        this.weaponButton = weaponButton;
        setImage(new GreenfootImage(70, 50));
        getImage().setColor(Color.YELLOW);
        getImage().fillOval(0, 0, 50, 50);
        getImage().setColor(Color.BLACK);
        getImage().fillRect(50, 20, 70, 10);
    }
    // tells the player character to use all the methods that have been created as long as the conditions are right for the given method
    public void act()
    {
        move();
        turnAround();
        shoot();
        time++;
        hitByZombie();

    }
    // tells the actor to turn to face the mouse
    public void turnAround(){
        button button = new button();
        if (Color.BLACK.equals(button.getCurrentColor())){
            if(Greenfoot.getMouseInfo() != null){
                turnTowards(Greenfoot.getMouseInfo().getX(), Greenfoot.getMouseInfo().getY());
            }
        }
    }
    // tells the actor to do if the button is black and if it isnt black
    public void shoot() {
        button button = new button();
        if (Color.BLACK.equals(button.getCurrentColor())){
            manualShoot();            
        } 
        else {
            autoShoot();
        }
    }
    // returns the buttons color to determine what the firemode is
    public static int getColor()
    {
        return button.colorValue;
    }
    // one of the firemodes that is player skilled based 
    private void manualShoot()
    {        
        MouseInfo mouse = Greenfoot.getMouseInfo();
        if(ammo>0){
            if (Greenfoot.mousePressed(null) && weaponButton.WeaponUpgrade == 1)
            {
                turnTowards(Greenfoot.getMouseInfo().getX(), Greenfoot.getMouseInfo().getY());
                Bullet bullet = new Bullet();
                getWorld().addObject(bullet, getX(), getY());
                bullet.setRotation(getRotation()-0);
                bullet.move(25);
            }
            if (Greenfoot.mousePressed(null) && weaponButton.WeaponUpgrade == 2)
            {
                Bullet bullet = new Bullet();
                getWorld().addObject(bullet, getX(), getY());
                bullet.setRotation(getRotation()-5);
                bullet.move(25);
                Bullet bullet2 = new Bullet();
                getWorld().addObject(bullet2, getX(), getY());
                bullet2.setRotation(getRotation()+5);
                bullet2.move(25);
            }
            if (Greenfoot.mousePressed(null) && weaponButton.WeaponUpgrade == 3)
            {
                Bullet bullet = new Bullet();
                getWorld().addObject(bullet, getX(), getY());
                bullet.setRotation(getRotation()-5);
                bullet.move(25);
                Bullet bullet2 = new Bullet();
                getWorld().addObject(bullet2, getX(), getY());
                bullet2.setRotation(getRotation()+5);
                bullet2.move(25);
                Bullet bullet3 = new Bullet();
                getWorld().addObject(bullet3, getX(), getY());
                bullet3.setRotation(getRotation()-0);
                bullet3.move(25);
            }
            if (Greenfoot.mousePressed(null) && weaponButton.WeaponUpgrade == 4)
            {
                Bullet bullet = new Bullet();
                getWorld().addObject(bullet, getX(), getY());
                bullet.setRotation(getRotation()-10);
                bullet.move(25);
                Bullet bullet2 = new Bullet();
                getWorld().addObject(bullet2, getX(), getY());
                bullet2.setRotation(getRotation()+10);
                bullet2.move(25);
                Bullet bullet3 = new Bullet();
                getWorld().addObject(bullet3, getX(), getY());
                bullet3.setRotation(getRotation()-5);
                bullet3.move(25);
                Bullet bullet4 = new Bullet();
                getWorld().addObject(bullet4, getX(), getY());
                bullet4.setRotation(getRotation()+5);
                bullet4.move(25);
            }
            if (Greenfoot.mousePressed(null) && weaponButton.WeaponUpgrade == 5)
            {
                Bullet bullet = new Bullet();
                getWorld().addObject(bullet, getX(), getY());
                bullet.setRotation(getRotation()-10);
                bullet.move(25);
                Bullet bullet2 = new Bullet();
                getWorld().addObject(bullet2, getX(), getY());
                bullet2.setRotation(getRotation()+10);
                bullet2.move(25);
                Bullet bullet3 = new Bullet();
                getWorld().addObject(bullet3, getX(), getY());
                bullet3.setRotation(getRotation()-0);
                bullet3.move(25);
                Bullet bullet4 = new Bullet();
                getWorld().addObject(bullet4, getX(), getY());
                bullet4.setRotation(getRotation()-5);
                bullet4.move(25);
                Bullet bullet5 = new Bullet();
                getWorld().addObject(bullet5, getX(), getY());
                bullet5.setRotation(getRotation()+5);
                bullet5.move(25);
            }
        } 
    }

    public void useSuperPower()
    {
        if(superPower.superCount>99 && superTimer< 30)
        {
            superTimer++;
        }
        if(superTimer > 30)
        {
            Bullet bullet = new Bullet();
            getWorld().addObject(bullet, getX(), getY());
            bullet.setRotation(getRotation()-60);
            bullet.move(25);
            Bullet bullet2 = new Bullet();
            getWorld().addObject(bullet2, getX(), getY());
            bullet.setRotation(getRotation()+60);
            bullet2.move(25);
            Bullet bullet3 = new Bullet();
            getWorld().addObject(bullet3, getX(), getY());
            bullet.setRotation(getRotation()-0);
            bullet3.move(25);
            Bullet bullet4 = new Bullet();
            getWorld().addObject(bullet4, getX(), getY());
            bullet.setRotation(getRotation()-180);
            bullet4.move(25);
            Bullet bullet5 = new Bullet();
            getWorld().addObject(bullet5, getX(), getY());
            bullet.setRotation(getRotation()+120);
            bullet5.move(25);
            Bullet bullet6 = new Bullet();
            getWorld().addObject(bullet6, getX(), getY());
            bullet.setRotation(getRotation()-120);
            bullet6.move(25);
            superTimer++;  
        }
    }
    // the second fire mode that is more of a auto fire to the nearest enemy
    private void autoShoot()
    {        
        if(pause>0){
            pause --;
        }
        if(pause == 0){
            if (ammo > 0) {
                if (getWorld().getObjects(Zombie.class).isEmpty()) return;
                Actor closest = null;
                int closeness = 9999;
                for (Object obj : getWorld().getObjects(Zombie.class)) {
                    Actor enemy = (Actor)obj;
                    int dist = (int)Math.hypot(getX()-enemy.getX(), getY()-enemy.getY());
                    if (dist < closeness) {
                        closeness = dist;
                        closest = enemy;
                    }
                }
                Actor bullet = new Bullet();
                getWorld().addObject(bullet, getX(), getY());
                bullet.turnTowards(closest.getX(), closest.getY());
                setRotation(bullet.getRotation());
                ammo--;
                pause = firerate;
            }        
        }
    }
    // gets the users inputs and moves the player accordingly
    public void move(){
        if(Greenfoot.isKeyDown("W")||Greenfoot.isKeyDown("UP")){
            setLocation( getX(), getY()-speed);
        }
        if(Greenfoot.isKeyDown("A")||Greenfoot.isKeyDown("LEFT")){
            setLocation( getX()-speed, getY());
        }
        if(Greenfoot.isKeyDown("S")||Greenfoot.isKeyDown("DOWN")){
            setLocation( getX(), getY()+speed);
        }
        if(Greenfoot.isKeyDown("D")||Greenfoot.isKeyDown("RIGHT")){
            setLocation( getX()+speed, getY());
        }
    }
    // tells the character to reload his gun when the user hits r
    public void hitbyZombie()
    {
        Bullet bullet = (Bullet)getOneIntersectingObject(Bullet.class);
        health --;
        getWorld().removeObject(bullet);

    }

    public void youWin(){
        if(time >100 && !isTouching(Zombie.class)){
            getWorld().showText("You Win! - you Survived the 60 seconds ", getWorld().getWidth()/2, getWorld().getHeight()/2);
        }
    }

    public boolean hitByZombie()
    {
        Zombie zombie = (Zombie)getOneIntersectingObject(Zombie.class);
        if (zombie != null && getNeighbours(getImage().getWidth()/2, false, Zombie.class).contains(zombie) && zombie.hitsPlayer(this))
        {
            return true;
        }
        else
        {
            return false;
        }
    }
}
import greenfoot.*;
public class Bullet extends Actor
{    
    public Bullet(){
        setImage(new GreenfootImage(10,5));
        getImage().setColor(Color.BLACK);
        getImage().fillRect(0,0,10,5);
    }
    public void act()
    {
        move(10);
        DestroyBullet();
        
        
    }
    public void move(int distance)
    {
        double radians = Math.toRadians(getRotation());
        int dx = (int) Math.round(Math.cos(radians) * distance);
        int dy = (int) Math.round(Math.sin(radians) * distance);
        setLocation(getX() + dx, getY() + dy);
    }
    private void DestroyBullet(){
        if(isAtEdge()){
            getWorld().removeObject(this);
        }
    }
    public boolean hitsZombie(Zombie zombie)
    {
        return getObjectsInRange(getImage().getWidth()/2, Zombie.class).contains(zombie);
    }
}
import greenfoot.*;
public class Zombie extends Actor
{
    int animateImage = 0;
    int animateSpeed = 5;
    int count;
    int health = 3;
    Player player;
    Counter counter;
    public Zombie(Player mainPlayer, Counter counter){
        this.counter = counter;
        player = mainPlayer;
        setImage("skeleton-idle_16.png");
        getImage().scale(80,80);    
    }
    public void act()
    {
        count++;
        animate();
        moveAround();
        hitByBullet();
    }
    // animates the zombie
    public void animate(){
        if(count % animateSpeed == 0){
            if(animateImage > 16){
                animateImage = 0;                
            }
            setImage("skeleton-move_"+ animateImage + ".png");
            animateImage++;
            getImage().scale(80,80); 
        }
    }
    private void moveAround(){
        move(1);
        turnTowards(player.getX(), player.getY());
    }
    public void hitByBullet()
    {
        Bullet bullet = (Bullet)getOneIntersectingObject(Bullet.class);
        if (bullet != null && getNeighbours(getImage().getWidth()/2, false, Bullet.class).contains(bullet) && bullet.hitsZombie(this))
        {
            health--;
        }
        if(health == 0){
            getWorld().removeObject(this);
            counter.Score++;
        }

    }
    public boolean hitsPlayer(Player mainPlayer)
    {
        return getObjectsInRange(getImage().getWidth()/2, Player.class).contains(mainPlayer);
    }
}
import greenfoot.*;
public class Counter extends Actor
{
    int Score;
    int cash;
    public Counter(){
        setImage(new GreenfootImage( "Score:"+ Score+
        "cash:" + cash, 40, Color.BLACK, new Color(0,0,0,0)));
    }
    public void act()
    {
        setImage(new GreenfootImage( "Score:"+ Score+
        "cash:" + cash, 40, Color.BLACK, new Color(0,0,0,0)));
    }
}
import greenfoot.*;
public class SuperPower extends Actor
{
    final int SUPER_POWER_LIMIT = 100;
    int superCount;
    int count;
    int superTimer;
    
   
    public SuperPower()
    {
        createImage();
    }
    public void act () 
    {
        createImage();           
        World world = getWorld();
        MyWorld game = (MyWorld)world;
        game.getPlayer();
        setLocation(game.getPlayer().getX() + 10, game.getPlayer().getY() - 80);
        useSuper();
        
    }
    public void useSuper()
    {
        count++;
        if(count % 10 == 0)
        {
            superCount++;
        }
        if(superCount >= 100)
        {
            superCount = 0;
        }
        
    }
    public void createImage()
    {
        setImage(new GreenfootImage(SUPER_POWER_LIMIT + 2,12));
        getImage().drawRect(0,0,SUPER_POWER_LIMIT + 1,11);
        getImage().setColor(Color.BLUE);
        getImage().fillRect(1,1,superCount,10);
    }
    
}
import greenfoot.*;
public class WeaponButton extends Actor
{
    int cost = 150;
    int WeaponUpgrade = 1;
    
    Counter counter;
    public WeaponButton(Counter counter)
    {
        this.counter = counter;
        setImage(new GreenfootImage("Weapon \n upgrade \n cost: " + cost, 25, Color.BLACK, new Color(0,0,0,0)));
    }
    public void act(){
        upgrade();
    }
    public void upgrade()
    {
        if(Greenfoot.mousePressed(this) && counter.cash >149)
        {
            counter.cash -= 150;
            cost +=50;
            WeaponUpgrade++;
        }
    }
}
import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
public class button extends Actor
{
    Color[] colors = { Color.BLACK, Color.RED };
    public static int colorValue = 0; // index of colors array 
        
    public button() {
        setImage(new GreenfootImage(70, 50));
        changeColor();
        changeColor();
    }
    public Color getCurrentColor() {
        return colors[colorValue];
    }     
    public void changeColor() {
        colorValue = (colorValue+1)%2; // toggle index between 0 and 1
        getImage().setColor(getCurrentColor());
        getImage().fillOval(0, 0, 20 , 20);
    }     
    public void act() 
    {
        if (Greenfoot.mouseClicked(this)) {
            changeColor();
        }
    }
    
}