That is a really cool one! Reminds me of the first Xenoblade game actually! It could be something I try to explore but I would need to remeber to make the setting my own. Plagurism would need to be something I need to keep in mind in that case. Like Id have to seriously consider how Id make it my own.
Approaching this idea, how would extracting resources from the god work? How would that affect the development of civilisation? Would the buildings be fleshy? Would the people bud off of the god's corpse like a cancer? Is this the only thing in the universe? How would other races react to discovering this? What killed the gods? (You can tell im good at asking questions, not so good at answering them.)