I haven't gotten a chance to play this yet, but I cannot wait to run it! I already have a group or two in mind who I think would enjoy it. I absolutely love the simplicity of it, it'll be so quick an easy to set up and jump right into things. I also really appreciate the fact that you didn't stop at simply explaining the mechanics and call it a day; the fact that you go on to give suggestions for running the game/flow of play, suggest safety tools, and list so many scenarios (every page I scrolled I was surprised that there were even more!) made this feel incredibly polished and easy to run. The longer I've played TTRPGs, the more I've been drawn to simple, rules lite systems, and this feels like a wonderful example of exactly the kind of game I want to try.
The Guardian Angel mechanic also feels like a great way to keep players invested and involved, I can easily imagine the tension ramping up as more and more PCs die but start jumping in to help their surviving friends.
Also, the layout and design of the document were great and made everything very easy to read, which I hugely appreciate.