User blog comment:QuebecanCanada/System-making game/@comment-6812733-20141124171009/@comment-6812733-20141124181627

Alright, I'll try that once I get some more systems since I'm at my limit right now, creating marine life in a planet that doesn't have atmosphere... It'll be interesting if the game lets me advance the life into an intellegent level...

Btw, from what I remember about the formation of Moon theories, a planet about the size of Mars collided with Earth and created the debris that would later form into our Moon so I'm guessing a small sized planet and a medium sized planet close to each other.