Thread: Help With a Simple Game

So to start off here's my code:

import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
 
 
public class Ski implements KeyListener{
 
    Image imgSkier, imgTree, imgGoomba;
    boolean crashed, leftArrow, rightArrow, upArrow, downArrow;
 
    int skierX, skierY, treeX, treeY, goombaX, goombaY;
    int skierWidth, skierHeight, treeWidth, treeHeight, goombaWidth, goombaHeight;
    int score;
 
    JFrame frame;
    GamePanel gPanel;
 
    public Ski()    {
        score = 0;
        treeX = 10 + (int)(Math.random() * ((500 - 10) + 1));
        treeY = 500;        
        goombaX = 10 + (int)(Math.random() * ((500 - 10) + 1));
        goombaY = 600;
        skierX = 100;
        skierY = 10;
        crashed = false;
        leftArrow = false;
        rightArrow = false;
        upArrow = false;
        downArrow = false;
        frame = new JFrame();
        gPanel = new GamePanel();
        gPanel.setFocusable(true);
        gPanel.addKeyListener(this);
        getImages();
        frame.add(gPanel);
        frame.setSize(500,700);
        frame.setVisible(true);
        animate();
    }
 
    public void getImages(){
 
        imgSkier = new ImageIcon("skier.png").getImage();
        imgTree = new ImageIcon("tree.png").getImage();        
        imgGoomba = new ImageIcon("Goomba.png").getImage();    
        skierWidth = imgSkier.getWidth(null);
        skierHeight = imgSkier.getHeight(null);
        treeWidth = imgTree.getWidth(null);
        treeHeight = imgTree.getHeight(null);        
        goombaWidth = imgGoomba.getWidth(null);
        goombaHeight = imgGoomba.getHeight(null);
    }
 
 
    class GamePanel extends JPanel{//inner class to customize a JPanel for drawing
 
        public void paintComponent(Graphics g){
 
            g.setColor(Color.white);//Avoid trails
            g.fillRect(0,0,this.getWidth(), this.getHeight());//Avoid trails
 
            g.drawImage(imgSkier, skierX, skierY, 60, 100, null);
            g.drawImage(imgTree, treeX, treeY, 60, 100, null);            
            g.drawImage(imgGoomba, goombaX, goombaY, 60, 100, null);
 
            g.setColor(Color.black);
            g.fillRect(400,0,84,30);           
 
            g.setColor(Color.yellow);
            g.fillRect(404,4,76,22);
 
            g.setColor(Color.blue);
            g.setFont(new Font("Arial", Font.BOLD, 12));
            g.drawString("Score: " + score, 415, 20);
 
            if(crashed){
 
                g.setColor(Color.black);
                g.fillRoundRect(60,100,350,200,20,20);
                g.setColor(Color.green);
                g.fillRoundRect(65,105,340,190,20,20);
                g.setColor(Color.blue);
                g.fillRoundRect(70,110,330,180,20,20);
 
                g.setColor(Color.black);
                g.setFont(new Font("Arial", Font.BOLD, 50));
                g.drawString("GAME OVER", 80, 180);
                g.setFont(new Font("Arial", Font.BOLD, 20));
                g.drawString("Your Final Score: " + score, 140, 230);                                
            }
 
 
        }        
    }  
 
 
 
    public void animate(){
      while(!crashed){
 
        treeY = treeY - 2;        
        goombaY = goombaY - 3;    
        if(leftArrow) skierX -= 5;
        if(rightArrow) skierX += 5;
        if(upArrow) skierY -= 5;
        if(downArrow) skierY += 5;
 
        try{
 
            Thread.sleep(10);
 
        } catch(Exception e){}
 
 
        Rectangle skierBounds = new Rectangle(skierX, skierY, 60, 100);
        Rectangle treeBounds = new Rectangle(treeX, treeY, 60, 100);
        Rectangle goombaBounds = new Rectangle(goombaX, goombaY, 60, 100);
 
        if(skierBounds.intersects(treeBounds)        ){
            crashed = true;
        }       
        if(skierBounds.intersects(goombaBounds)        ){
            crashed = true;
        }
 
        if(treeY < 1){
            score = score + 1;
            treeX = 10 + (int)(Math.random() * ((500 - 10) + 1));
            treeY = 600;
        }
 
        if(goombaY < 1){
            score = score + 1;
            goombaX = 10 + (int)(Math.random() * ((500 - 10) + 1));
            goombaY = 600;
        }
 
 
                        gPanel.repaint();
      }//close loop
    } //close animate  
    public void keyTyped(KeyEvent e){
 
        if(e.getKeyCode() == KeyEvent.VK_LEFT){
        leftArrow = true;            
        }
        if(e.getKeyCode() == KeyEvent.VK_RIGHT){
        rightArrow = true;            
        }      
        if(e.getKeyCode() == KeyEvent.VK_UP){
        upArrow = true;            
        } 
        if(e.getKeyCode() == KeyEvent.VK_DOWN){
        downArrow = true;            
        } 
    }
    public void keyPressed(KeyEvent e){
 
        if(e.getKeyCode() == KeyEvent.VK_LEFT){
        leftArrow = true;            
        }
        if(e.getKeyCode() == KeyEvent.VK_RIGHT){
        rightArrow = true;            
        }          
        if(e.getKeyCode() == KeyEvent.VK_UP){
        upArrow = true;            
        }   
        if(e.getKeyCode() == KeyEvent.VK_DOWN){
        downArrow = true;            
        }   
 
    }
    public void keyReleased(KeyEvent e){       
 
        if(e.getKeyCode() == KeyEvent.VK_LEFT){
        leftArrow = false;            
        }
        if(e.getKeyCode() == KeyEvent.VK_RIGHT){
        rightArrow = false;            
        }   
        if(e.getKeyCode() == KeyEvent.VK_UP){
        upArrow = false;            
        }  
        if(e.getKeyCode() == KeyEvent.VK_DOWN){
        downArrow = false;            
        }  
 
 
    }     
 
    public static void main(String[] y)
    {
        Ski s = new Ski();
 
    }
}

What I'm looking to accomplish is some kind of "leveling" system. I feel like this can be done by using if statements (ex. if(score > 4){....}). However I've tried placing a few in different spots in the code and I haven't gotten what I'm looking for. I'd like to start off with just one image you need to avoid and at some point have the other image appear and so on. Any help is appreciated, thank you. Also I'm new to these forums so if something is wrong with this post, don't hesitate to tell me.

Thanks for the quick reply. Here's what I'm looking for. Right now I have the tree and the goomba moving vertically up the screen from the very beginning of the game. I would like the tree to be the only image until the score > 4, then the goomba image would appear and start moving. The closest I've gotten is having the goomba image sitting at the bottom of the screen until the score reaches a certain point and then it will start moving. If push comes to shove I can set the goombaY = 700 so it is completely off the screen but there must be a way to not have the image appear until the score reaches a certain point.