Ah, thank you for your replies! I guess I did everything right then, just for some reason the x's and o's didn't appear. I thought that was rather fiendish, but I did finally win the game (the sound indicated when I lost)and got the key.
I can't remember which scene with the snowflake but
it was supposed to appear around diamond shaped window panes
. No, no Texas, don't go to any trouble - you must have seen it or it would stick in your mind. Thanks though! Since the little game board didn't have the x or o, I think they were the same place as the snowflake, not on my screen.