Fel med löjligt enkel javakod

public void tick(){
		

		if(input.up) posY -= 2;
		if(input.down) posY += 2;;
		
		bbox1 = new Rectangle(enemyX, enemyY, width, height);
		bbox2 = new Rectangle(ballPosX, ballPosY, 40, 40);
		
		ballPosX += ballSpeedX / 2;
		ballPosY += ballSpeedY / 2;
		
		if(ballPosY >= HEIGHT - 40){
			ballSpeedY *= -1;
		}
		if(ballPosX >= WIDTH - 40){
			ballPosX = WIDTH / 2 - 40;
		}
		if(ballPosY < 0){
			ballSpeedY *= -1;
		}
		
		if(bbox1.intersects(bbox2)){
			ballPosX -= 2;
			ballSpeedX *= -1;
		}
		
		enemyY = ballPosY;
		
	}
	
	public void render(){
		BufferStrategy bs = getBufferStrategy();
		if(bs == null){
			createBufferStrategy(3);
			return;
		}
		
		Graphics g = image.getGraphics();
		g.setColor(Color.BLACK);
		g.fillRect(0, 0, WIDTH, HEIGHT);
		//g.dispose();
		
		
		g = bs.getDrawGraphics();
		g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
		
		//Draw here. g before
		g.setColor(Color.RED);
		g.fillRect(posX, posY, width, height);
		g.fillRect(enemyX,  enemyY, width,  height);
		g.fillOval(ballPosX, ballPosY, 40, 40);
		
		g.dispose();
		bs.show();
	}

public Main(){
		posX = 80;
		posY = HEIGHT/2 - 80;
		width = 40;
		height = 160;
		enemyX = WIDTH - 80 - width;
		enemyY = posY;
		ballPosX = WIDTH / 2 - 20;
		ballPosY = HEIGHT / 2 - 20;
		
		
	}