We always play this game with my friends here in Turkey. But shouldn’t the middle card change when both sides say they don’t have it? The game was really fun by the way, congrats!
I played a bunch here in Brazil too, but with some little different rules too. For the jam, I felt that the card always moving forward worked better. But maybe with more players a more traditional rule would be great. Thanks for the feedback and I'm glad you had fun!