suggestion: make a harder mode for more experienced players. one that relies more heavily on board patterns. cause at the moment one doesn't actually have to know the patterns to win a board (I think)
You should try beating the game without using heart scrolls until the last possible moment, which is only once you reach 11 hearts. It's really difficult.
yeah actually I take back what I said earlier - I've been trying for a long time now to get all 3 stamps in one run, this is hard enough... I don't know how I got the rats stamp earlier. must have been luck. thanks for the suggestion with the hearts.