Flockbay
Godot is a smart foundation for this. It's free, open source, and already the darling of indie devs who want to own their tools. Building an AI wrapper on top of it means Flockbay isn't locked into someone else's proprietary engine, and the output can be exported anywhere Godot goes.
The free part is what catches my eye. Plenty of AI game tools charge per generation or push you into a subscription. Flockbay saying free suggests they're betting on scale and community, or they're still figuring out the business model. Either way, it lowers the barrier for people who want to prototype an idea on a Sunday afternoon.
I'd want to know how much control you actually get over the generated code. AI tools are great at producing something that runs, but games live or die on feel, and feel is hard to prompt your way into. Still, for rapid prototyping and learning, this could be a fun on-ramp.