nice game! but if theres one problem that needs to be addressed its feedback! when i shoot a enemy i have no idea if they even got hit or took any damage, i dont have any idea of how much health they have, the guns aim is off but it looks like thats for aesthetics shape, even then i cant tell if im aiming at the enemy or not and where their hitbox is. i came to assume their hit box is their shadow not as a player but knowing how someone might have made this as a developer. there was no tradeoff for sprinting so i found myself just holding shift the same time and this is a common mistake i see developers make, either just have one set walking speed or treat sprinting as a ability, like all things it should have some cost whether it be a cooldown (time) maybe a bit of vulnerability after running to long, or energy, etc.
aside from that you still have a very interesting concept here that can be taken in some amazing directions, for example ammo could also be your ammo and shooting will cost you progress to your goal or something like that. i really hope you do more with this and cant wait to see what you make in the future! congrats on submitting