Where should I start? I'm totally stunned by this game. The idea is afaik unique and awesome, it is the most polished game I've seen so far in the jam (gameplay, introduction, effects, you even have a leaderboard). The game boy aesthetic is beautiful. I'm in love!
To find at least something to criticize: It would be nice if the tutorial mode could be turned off, as soon as you have learned how the game works.
Have you thought about making the little guy able to pass the turned blocks in a straight line, if the card at the other end is a match? That would enable even more advanced play.
I'm out of words, you have delivered big time, chapeau!