I actually started with Svelte, partly because I wanted to learn it. I couldn't figure out a good way to tie its reactivity to my needs so I ended up dropping it in favor of Vue.js.

As for things to show, it's still quite early as I want to nail down the rendering engine. I've yet to create drawing tools which will allow me to more easily create complex visualizations.

Here's something I pretty quickly rigged up though which I think is fairly mesmerizing: https://imgur.com/a/ELhwWo5