Here's another game ported from BASIC (in Tim Hartnell's book).
Like the manufacturing simulation, this game is (now) quite easy. I was tempted to add a graph showing the fluctuations of the colony's key resources, but - in the end - I restrained myself.
Unlike the manufacturing sim, this game (optionally) asks the user no questions, since most of the calculations are difficult for the user (and easy for the program).
Enjoy.
S.