Microscopic Adventures

I was thinking today how interesting this could be as a supplement for White Star (or X-plorers, or Terminal Space, or Starships & Spacemen, or any other OSR space exploration game).  Instead of going big, why not go very, very small?  (Maybe I should make a bestiary of bacteria, viruses, and components of the immune system.)  In the tradition of Fantastic Voyage, Innerspace, and that Batman: The Brave and the Bold episode where Aquaman and the Atom travel through Batman's blood...