generar un juego de la serpiente en java

package Snake;

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Random;

import javax.swing.*;

public class Snake extends JPanel implements ActionListener, KeyListener {
	
	public static final int SCALE = 32;
	public static final int WIDTH = 20;
	public static final int HEIGHT = 20;
	public static final int SPEED = 5;
	
	Snake s = new Snake();
	Timer t = new Timer(1000/SPEED, this);
	
	public Snake() {
		t.start();
		addKeyListener(this);
		setFocusable(true);
	}
	
	public static void main(String[] args) {
		JFrame f = new JFrame();
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		f.setResizable(false);
		f.setSize(WIDTH*SCALE+7, HEIGHT*