Really nice looking game, love the 3d models and the general feeling of it. The music is also great (fucking loved it) and the robot animation on the main menu is lovely :3.
Now with the things i would improve.
-Jumping animation feels kinda strange, you levitate a bit too much. More weight on the player i think would solve the problem. Also a jumping sound and a hit when they shoot at you would give some nice feedback to the player.
-Found myself using rewind mechanic only 2 times in 3 runs, maybe making a map that makes that mechanic more usable would be great.
-Some minor bugs with jumping and going through things (only happened 1 time so no big deal).
Overall a really fun experience, one of the games i've played i liked the most. Congrats :P