Ah sorry about that issue you're running into, I'll look into it. What browser are you using? If you still want to give it a try there's a PC version you can download that should work.
I use Safari
I tested it on my Mac using Safari and it worked fine on my end, but its probably just a specific version of safari that has issues. WebGL tends to run more smoothly and with better support in Chrome, so I’d recommend trying it there
