Great puzzle design, and I liked the way I could zoom in and out to get clues on what to do. There were a lot of obscure rule that were difficult to figure out, but they usually made sense once I did. I don't know why I was able to click off the face block characters and not click them back on again, though. Once you figure out all the rules and get the wires on various levels powered on, it's very satisfying to see it all light up.