Hey played it and I am amazed that you managed to do all this in a week! The gameplay is really smooth and fits the theme perfectly, and it's just so satisying to shoot! I really enjoy the idea of making the reload such a weakspot, as you always has to keep an eye on your ammo so you don't run out when you're in the middle of all the zombies! That combined with the instadeath makes this pretty damn difficult but also pretty addictive to wanna try again and just last a bit longer!
As some has pointed out I do think the camera is a bit clunky at times but I mean the camera in my game is even clunkier so I guess I can't really complain on that part hehe. Overall great game and I am still just amazed you managed to do all this with all the different zombie designs in a week! Great job!
And here's my game if you wann try it out: https://itch.io/jam/blackthornprod-game-jam-3/rate/900205 It's also a 3D game but with 2D sprites! And you try not to explode! Wooo!