Nicely done! It was really fun and I played it all the way through. There are some issues, like the fact that there are sound effects missing and that you sometimes spawn too close to enemies, so you get hit before you can reliably react. I do have a soft spot for games in which you have to indirectly kill enemies. I like using the environment to get rid of them or, in your case, having to either force them to hit each other or lead them into the rewind trail.