Galaxy Cards is a very cool game, nicely designed! How quickly did it take you to decide on the mechanics for this game? I agree with Woahjess' feedback and I also really enjoyed the concept.
The game works so well, too! I think you should be very proud of this accomplishment.
My scores;
First time round: Total Earned; 642,211
Second time round: Total Earned; 2, 235, 378