Thank you for playing and making a detailed comment. Yeah, I'm actually thinking already about how to implement those Unreal Tournament shouts for headshots, kill chains, multi-kills. Also stats and achievements would be great at the end of the level, and challenges like pacifist or genocide runs could create some replayability. Just would need to think about what those can unlock except the satisfying feeling of having a checkmark on the level screen.
I already had different maps in mind for the jam version, but time was too tight. Different Zombie types can definitely work. Also different weapons like a flame thrower, machine gun or rocket launcher would be very fun. Melee attacks with the rifle in close range...
Definitely a lot of potential for more here