This is a very cool concept! I enjoyed playing it and here are my remarks:
- The dialogs are not loud enough, I couldn't hear very well what the people were saying.
- I was a bit confused by the rewinding mechanic and am not entirely sure how to use it.
- Moving around the map felt a little bit grindy, maybe add a way to sprint (?)
If you make it a full game, I would really love to play it!