Help with Phaser 3 game setup

Hi everyone,
I am having a really hard time getting Phaser to run on VS Code. I have the framework and my game.js file, and I tried loading a background image for my game, but all I see is a black square when I open it with the Live server, or my Wampp server. This is my html:

<meta charset="UTF-8">

<meta name="viewport" content="width=device-width, initial-scale=1.0">

<title>Document</title>
<script src="https://cdn.jsdelivr.net/npm/phaser@3.24.0/dist/phaser.js"></script>

<script src="game.js"></script>

And this is my game.js file:

var game = new Phaser.Game(640, 360, Phaser.AUTO);

var GameState = {

preload: function() {

    this.load.image('sky', 'assets/sky.png');

},

create: function() {

    this.background = this.game.add.sprite(0, 0, 'sky');

},

update: function() {

}

};

game.state.add(‘GameState’, GameState);

game.state.start(‘GameState’);

If anyone could help, I’d really appreciate it.

Is anything written to the console when your application runs?

My bad, I should have taken this question down @seyuup. I realized that I was using Phaser 2 instead of Phaser 3.