Very interesting game. Even with the tutorial a bit hard to figure out what to do the first few codes. I'd really like to see more game modes or something to make it more fun, challenging in different ways or even with some kind of a story? Currently it feels like something that you try a few times and have no more reason to play, unless you want to challenge someone to break more codes than you.

It's probably because the game has such interesting mechanics that i feel it could be expanded to include more stuff. :)