More recently, I've been working on https://boardgamelab.app/, which uses a visual programming language to model game rules while also taking care of the UI layer.
Suppose there were a technology that could turn the canvas you authored into finished, consistent art; and a way to turn natural language rules into correct code. Would you use it? Why or why not?
Like a jpeg? Otherwise I don't understand your question.
" a way to turn natural language rules into correct code"
And this is straight impossible, as natural language is by definition ambigious in meaning and code is not. Try your luck with LLM's, they come closest.
(a subset of natural language might work, but this is kind of a complex research topic)