Zombie Incursion

It was a quiet afternoon. You are busy sleeping during the day, unaware of the dangers that is approaching.  Fortunately, you got an eye of a zombie.  You grab your chainsaw and went on to battle them.   You are able to survive the day, but that doesn't mean that they will stop.   Each kill will earn you money.  Killing them in combos will give you additional money.  You will get stars based on your performance on every level.  You can play the same level over and over again to gain more money that can be use to buy better guns.