Great atmosphere building! There's a constant, nice risk/reward calculation that keeps things interesting. It's not a complex game, but it doesn't need to be; it keeps things simple and executes well. There's a nice level of attention to detail here (little things like the time between turning the gun and pulling the trigger) seem carefully thought out and well-calibrated. The game does a really nice job of building tension.
I enjoyed my time with it. Nice work!