Yeah, I couldn't make the tutorial work well on mobile since it has to show quite a lot at the same time. Rather than forcing it into a mobile view I decided to keep it as is. I might revisit that in the future and do something similar to svelte's tabbed interface.
The website is completely blank white for my samsung s7 android edge browser (but works fine on android chrome). If this was written using your framework, there's probably a bug that's causing it not to render.