Just wow. I agree with the other comments, the UI is not only snappy but also very intuitive.

There's a developer, much better than me, putting his soul into this, that's for sure.

Even building an MS Paint clone in the browser that has good UX on desktop as well as mobile is not an easy task.

I'm happy to have clicked (tapped) the link now that it has 8 comments. Wonder why I only read the headline 15 minutes ago.