The game and the functionality is great. I would just recommend improving the level design in the game.
Viewing post in Agent Rewind jam comments
The level design felt very linear. There wasn't much problem solving, but rather "here's a problem. walk around. find solution". The rewind function in a spy game could be incredible, but I felt like the level design really didn't do that justice. It's not necessarily a "the game's too hard" or "the game's too easy" situation. It just didn't feel like the rewind was incorporated well into the game.
You could've taken this so much further, doing things like reading passwords then rewinding to before someone typed it and typing it yourself. Maybe you could use rewinds to distract guards somehow. Instead, you guys incorporated puzzles and memory games, that basically feel like cheating when all you're doing is just rewinding a bunch until you get it right. This can seriously be taken really far and I honestly hope that you do.