I would say you need to fix a couple of fixes in the programming, as somehow I can't shoot or the gun is jammed. the zombie needs to have a better pathing. Other than that great work on making the game in 1 week !
There are a couple of things you have to do with the shooting: make sure your sprite and crosshair is facing the same way when moving, only when you're idle you can shoot anywhere. And press the number keys to use different weapons
