I love it! It's definitely an exercise worth taking. Nice transfer size, and I'm happy to see that the code is quite maintainable.

I do my wordsandbuttons.online in similar spirit: no dependencies, and all the pages are kept below 64KB. However, as the code base grows, I'm starting to employ scripts to do the grunt work for me. So while I don't have dependencies per se, code patterns become dependency it its own right.