Nice demo. The combat system needs rework though.
"Enter" is used to go to next message so having it for fire control means you're going to shoot at least one bullet just to get rid of the message saying you acquired the gun. That also means you're probably going to shoot on anyone you talk to...
The zombie attacking you seems to prevent you to turn around essentially stun-locking you if they are coming from anywhere but the front. I mean sure "don't let them come near you then", but if it is not an intended mecanic i think you should implement a short immunity to prevent said stunlocking.