I really love the graphics and the sounds and also the idea of having a kind of sandbox puzzle game, it's really impressive what you pulled off in one week, but there are a couple of things that hold it back, I think:
1. You don't explain almost anything. You don't tell the player that he found the agent, and such.
2. I don't think there is enough telegraphing. It is frustrating to do all of the busy work again just because you couldn't guess that acid would come out or something like that. If you could show the player what the threat is and give him a chance to fight it the first time, I think it would be a bit nicer.
Also, you can remind with some kind of sound effect the player when the agent is going go off screen and stuff like that.
3. Not enough checkpoints. I found myself redoing the same stuff over and over again because I didn't see any 5-G thingy, and it was a bit frustrating.
4. Rewinding isn't actually a part of the gameplay. I might have missed something but from what I understood rewinding acts just like a checkpoint.
5. The player and npc sprites don't turn around when they walk the other way. It might be intentional but it feels a bit weird.
6. I found a bug that let you walk over some of the buildings. Nothing major, but still a small bug.
Don't want to sound negative though, this is a really good game! Please make a post jam version!