What if you made the upgrades go into a upgrade tree instead of it just making it slightly more useful
I also have some ideas for upgrades
- Friend/Conrad - they can shoot with you
- Doggo - bites zombos to make them go even slower and slowly kill them
- Fast Zombo - They run -
- Dagger - Gives more health maybe and gives a melee attack? -
 "Reaper of the Undead"){kind=icon}
 "Mutilate-a-Doll 2"){kind=icon}