I like the turned based stealth concept a lot, great idea. As some commenters mentioned, I also think the game could explain itself better, as in why isn't shift working, why are the legs breaking ("Did I something wrong?") and I also thought I was the guard. Also I think when the guards are taking double turns, the game could do those a little faster. There's a moment of waiting, that's (at least for my personal taste) a little too long.