Hello, I downloaded a copy of phaser and threw it in my MAMP folder - started my local web server. And then created a basic game.html file + game.js + phaser.js. game.html looks like this: <html> <head> <script src="phaser.js"></script> <script src="game.js"></script> </head> <body> <div id="game"></div> </body></html> game.js looks like this: var headImage;var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create, update: update });function preload() { game.load.image('head', 'head.png');}function create() {}function update() {}I opened in chrome, and am seeing a blank page with the following error in the console: "Uncaught TypeError: Cannot read property 'style' of null" I'm not sure what I'm doing wrong.