How much is yours, and how much is the LLM's?

Code-wise, mostly LLM. I gave it the original QBasic source code so that's not mine either.

This experiment was a guidance experiment for me with Fable. Heavy spec and planning architecturally and UX, and strictly no JS frameworks or dependencies.

I do these kind of experiments with new models, and Fable has been the most successful so far for capturing the intended UX and feel per spec.