Yeah, I struggled trying to get the difficulty right. If I make it too easy, then people who are already good at this kind of game would be able to win without much effort and get bored, but if I make it too hard more people won't be able to win at all. I wanted people to have to try a few times before they figured out the right patterns for how to win, but I didn't want it to be so hard that people got frustrated. I don't know if I got that balance right, or if it's even possible to get that balance right for everyone.