Hi, nice work. Along with Moritz comments you could require each pin be tapped a different number of times based on some feedback you get. Completely aesthetic, but I'd like to have to do something to simulate turning the key - even if it's just pressing a key. You could also add an external timer that adds tension to which / how many locks you pick, such as a person chasing you down from room to room. People seem to like the game. :D