Hey man, great to see your game !
Here is some detailed pros and cons for you.
Pros:
-Love the rewind mechanics
-Really like the shoot to get further mechanics
-The art was clean
-The sounds were fine and feedback was present when enemy got hit
Cons:
- Was really hard to jump from platform to platform as I was getting stuck at every slope or even wall (To fix this just make your character collider into a box and a circle. Id also recommend making it 0 friction as that would just make character fall instead of getting stuck)
-The level design was a bit difficult
-The reloading was not probably necessary as you would have been fine with a very low rate of fire and less boost from it to compensate for the rate of fire. I sometimes found myself forgetting to reload.
-Overall needs some polishing to give it the great feel it deserves.
Overall pretty good game if i say so hah. Hope you dont take this personally and approach this pros and cons with open mind.
If it is not a big bother id ask you to check my game out if possible as that will really help to progress it.
Thanks again and wish you good luck !