Your scenario had a number of major flaws that lead to it's downfall, example one being the ceiling heights, they are all locked at one height, the lighting, it's dull and needs more shading, texturing is repetitive and enemy placement-ammo ratio is pretty god awful, i mean, on the first level, we are forced to fight off several fighters with fists.

You need to try and improve, and I admire you for using M1A1, and you even figured out how to make terminals, which I still don't know how to properly make.