Just want to point out that the flow you're describing is not that noteworthy and has been doable in many instant text-to-app services for at least a year, and doesn't really include any of the points that OP highlights as the USP. Vercel has their own (v0) etc. Your version even looks the same as when you tell WebSim to make a snake game. Townie from val.town is the best in my opinion because it can also generate live backend endpoints.
It's a really saturated market but I wish OP the best of luck.
It's a really saturated market but I wish OP the best of luck.