Gave it a try. I don't mind the old-school aesthetic-- in fact I love that sort of thing, but there were a few problems I ran into:
How to pick up new weapons? I'd see them but no button seemed to work.
Having to reach across the keyboard to press Enter to open doors was inconvenient.
The enemies are bullet sponges, taking way too many bullets to kill. And ammo is pretty sparse. I ran out and it respawned me with no ammo leading to a loop of meat grinding death. Is there no melee mechanic?
I appreciate the ideas behind the game. Retro military shooters and old war history are something I find fascinating. And who doesn't like shooting Nazis? I love how you have so many of these types of games on your itch page-- lots to choose from. Keep improving and you'll really have something here.