Really interesting and ambitious game that the 4 of you went for! I found myself organising my travel brouchures into various groups to keep track of a couple of key topics, really liked the system.
My one point to raise would be giving the player some form of feedback as to whether the planet they chose was right or not. After handing out several brouchures I realised I had no idea if I was doing well or not. I then started randomly giving them out as each new alien came in, without asking any questions. It took about 10, but then I was fired.