I love seeing nonsense like that. How that work graphically though? Just keep adding to a same QR code that keeps getting denser as more text is added? I guess it doesn't have to practical though :)

    - https://fuglede.github.io/llama.ttf/
    - https://github.com/bjia56/translate.ttf
    - https://github.com/hsfzxjy/handwriter.ttf

Harfbuzz now has WASM interpreter for a shaper. You can make pretty much arbitrary programs in fonts now.

https://www.youtube.com/watch?v=Ms1Drb9Vw9M