Interesting concept! I like the map you made to show where the enemies are. I also enjoyed the rewind mechanic, although I did forget about it after a while, so it might be useful to give an indicator that the robot is about to die. Also, an automatic gun is a bit on the boring side since all you do is move around and aim.
The enemies also ended up following the player most of the time, so the AI wasn't really something I had to protect. The enemies themselves are also a bit lackluster, since they move very slowly.
I did enjoy the power ups you placed in the corners of the map though!
The graphics and audio could always be a bit better, but for a game jam, I think they look pretty good! (Especially some of the UI)
I think my main complaint is that the game is on the slow side, and for this type of game, a faster pace would be much more enjoyable.
Overall, you did a pretty good job! I hope my feedback can help you create more cool projects in the future! :)