Brilliant idea and execution! The general concept of shooting from the place of your victim was very fascinating and intuitive. I think it flowed very well and the gameplay was on point. I managed to get through all of the levels eventually, but admittedly I did have a lot of trial and error figuring out how some of the other mechanics worked. Like I didn't really get what was going on with the ammo system at first. I think I expected the next shot I fired would come from where I currently was, especially if the player was already dead, but I got it figured out eventually. I also didn't immediately realize I would need to revive the player on some levels. Some exposition or a tutorial might be a nice future addition.
The game has the vibes of the old flash games we all used to play before they stopped supporting it, so if your engine has any sort of web player support I would really recommend doing a build with it, as it would be really fitting. Also, it would be really cool if the dead guys also raised their own gun when you used them to shoot, or maybe if it's actually the bullet leaving their corpse and not their gun maybe a little blood graphic or something could be cool.