Cloudberry Kingdom, Spelunky, and many rogue-likes all do this on a smaller level, but are always constrained by parameters. While they seek to create an AI that will take on more of the tasks, it will still have to be fed parameters created by an author, so unless this AI can create itself, how can it be called truly creative? Rather it is just procedural generation. It may be worth doing but calling it creative is hyperbolic.