Thank you for making this video!
This game is pretty hard indeed. A key to finishing it is to memorize enemy placement. Saving ammo and always peeking from corners is a combination of success! The game is trying to simulate real combat situations. It has only 4 missions, last one is a boss fight (and a tricky one). I'm thinking about continuing the series of "short-but-hard" FPS games based on real historical events.
Your A. I. S.