Balance might be easier if we started with larger food and fuel supplies. 10 food means a full crew can't even make it to the farthest planet. This is a very ambitious project but it works, well done. 1 possible bug(?) I encountered: I had 2 food, and 2 crew, but I lost a crewmate for lack of food, which didn't seem right to me. Keep up the good work, you have a very solid framework to expand upon here!