Screen not rendering after separating into multiple classes

Newbie & Debugging Questions
#1

I tried to separate the main class (the only class) into input and screen, as well as the remaining main class. Before, I could see a colored window with a rectangle and title but now it’s just blank, even though it doesn’t say I have errors. Here are the 3 classes:

Game.java

package com.izipizi.net;

import java.awt.Color;

import javax.swing.JFrame;

public class Game extends JFrame {

private int x=200;
private int y=150;

public Game(){
	addKeyListener(new InputKey());
}

public static void main(String[] args) {
	new Screen();
	new Game();
}

public void setX(int x){
	this.x=x;
}

public int getX(){
	return this.x;
}

public void setY(int y){
	this.y=y;
}

public int getY(){
	return this.y;
}

}

//////////////////////////////////////////////////////////

InputKey.java

package com.izipizi.net;

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class InputKey extends KeyAdapter {

int speed=3;
Game game;

public void keyPressed(KeyEvent e){
	
	switch(e.getKeyCode()){
	case KeyEvent.VK_UP:
		game.setY(game.getY()-speed);
		break;
	case KeyEvent.VK_DOWN:
		game.setY(game.getY()+speed);
		break;
	case KeyEvent.VK_LEFT:
		game.setX(game.getX()-speed);
		break;
	case KeyEvent.VK_RIGHT:
		game.setX(game.getX()+speed);
		break;
		
	}
	
}

}

////////////////////////////////////////////

Screen.java

package com.izipizi.net;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;

import javax.swing.JFrame;

public class Screen extends JFrame {

int WIDTH=480;
int HEIGHT=360;

private Graphics dbg;
private Image dbi;
Font font=new Font(Font.SERIF, Font.BOLD,30);

Game game;

public Screen(){
	setBackground(Color.cyan);
	setSize(WIDTH,HEIGHT);
	setTitle("Simple Game");
	setDefaultCloseOperation(EXIT_ON_CLOSE);
	setResizable(false);
	setLocationRelativeTo(null);
	setVisible(true);
}

public void paint (Graphics g){
	dbi=createImage(WIDTH,HEIGHT);
	dbg=dbi.getGraphics();
	paintComponent(dbg);
	g.drawImage(dbi, 0, 0, this);
}

public void paintComponent(Graphics g){
	g.setFont(font);
	g.setColor(Color.red);
	g.drawString("Epic Square of Epicness", 70, 70);
	g.fillRect(game.getX(), game.getY(), 18, 18);
	
	repaint();
}

}

/////////////////////////////////////////

The solution is probably something simple but i’m a newbie so please explain me.
By the way, when the screen appears i get this message in console:

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)