I work on a game that runs in a browser on mobile and synchronizes a physics simulation with orders of magnitude more relevant data. That's the benchmark upon which I scoff.
The demo actually doesn't show what the paragraph above it claims (customizable, extensions, artisan etc.)
And the demo shows how you can customize the styling, the power of extensions and how that all can be put together in a custom way. But maybe it doesn’t communicate all that very well.
Keep in mind it’s an MIT-licensed open source project, we just launched two days ago and we didn’t even post it here.