Those asking for a trading block aren't thinking through how it'll be abused. Earn your damn cards and enjoy it. (It would be nice to get a "you earned a card! Pick one of these three" or something like that, though.)
Enjoying the game so far!
"Oh-ho! I have you now, you nasty enemy bot that I am following! Oooh, shiny thing! I'll go over there and show you my butt, instead."
I want to like it, but the AI hates me.
tip: cross your eyes so that the two images are superimposed. The diffs just pop out at you. Doesn't work on the mirror image ones.
I got stuck on the flashing building at the sunrise, too. Gah. Still, 5 of 5.