I was thinking,  if you are still planning on making a space walking section in the game, you could add an event were you find an artifact floating in space and when you collect it you will double your brood in its early stages.

there is an exit door to outside so this would be a genius idea

that's a good idea, maybe make a CG room to reactivate event mini games by placing a star-node in the middle of the corridor room post-after story.