I think you should ease the player in a bit more, it was day 2 or 3 until I knew what I was actually doing, despite that I got the good ending on my first try. A small introduction that slowly introduces you to the different mechanics would be appreciated. Otherwise, it was a neat idea, but the decisions didn't really feel like they had a lot of impact, I was pressing button, and some teammates lost health, but it never felt like that my actions directly influenced it, it might just be a lack of feedback of anything happening.