I am new to phaser and was working through the JS tutorial and loaded up the example. Checking the console, I realized I was getting some errors in the console: 
The sprites from http://labs.phaser.io were being loaded over HTTP by an XHR. My browser refused to load them as they weren’t served over HTTPS. Maybe this is something the devs would want to be aware of and maybe fix? Thanks!
Did a little more digging and found out that its this line in this example that causing the problem:
(inside of the preload function). If your server supports https, why not use it? It’s an easy fix so that people dont have to worry about it.
actually you can load labs tutorials over https too. So you can setBaseURL to https://labs.phaser.io.
I know. I had to figure this out on my own. What I’m saying is maybe you should update the tutorial. Sorry I didn’t make that clear.