When I tinkered with Raylib (diff bindings) instead of a game I made a (2D) polygon format+loader. Probably to a usable state, though clunky esp. w/2 polygon formats (fan vs. strip).
I probably would get further with more experience, though also Godot w/bindings seems like a no-brainer (for editors, systems) considering it's still pretty light compared to the Un- engines.
(Not that I'm doing much with Godot either, viability and motivations are mismatched)