Also found this later version of the zombie shooter.

https://drive.google.com/file/d/0B2Wuir9-DSiUY2V5MnY1ZmF5TTQ/view?usp=sharing

This one has shooting, reload, jumping, crouching, moving boxes, etc, with sound effects. Click F1 to toggle between third and first person view.

This one here is something different that I can't run because it crashes but maybe it will run on Windows 7, which I think I used when making it.

https://drive.google.com/file/d/0B2Wuir9-DSiUd3d5bG9kSlhRWnc/view?usp=sharing