I was playing it with additional difficulty for a while‒I misread the instructions and thought that you only bridged a transfer for cards plus or minus one of your own rank (I still managed to mostly win with these rules, though)
Tried out the game with real cards, as well: not as good having to use spades and clubs, but still very fun
My only complaint: the maximum stack length is annoying, and also isn't even specified in rules, I wish this would be fixed