New Zombie Killer Update, "The Boss Approaches" update

Hello all who are interested in my game Zombie Killer. I have a new update for you.

Added: 

-A boss Zombie with twice as much Health as a regular zombie and guaranteed drops of Ammo and first aid on kill.

-A boss Encounter should happen ever 5 regular Zombie kills

Changed:

-Some spelling and grammar typos fixed

Hope you all enjoy this new update and thank you for following the development of Zombie Killer!