Haven't finished it yet, but damn this game is good. The stealth mechanics are simple and easy to understand, but the level design takes them to their full potential. The game is challenging as fuck, but also feels fair. The fact that you have to backtrack the level after also really adds more depth, since you'll want to gather as much special shots as possible to get through. If I had any complaints about this game, it'd be the fact that there isn't much you can do once you get caught, but even then, that kinda falls under the quirks of the genre anyways. Great work mate!