Aiming
A very good zombie def game. I liked how you get new weapons, how finding people is VERY important (didn't do that the first time I played and lost fast), and the berret (50 cal anti material {metal, stone, etc} sniping riffle) was awsome. The only thing I didn't really like was the aiming system. I didn't always know where I was shooting at... just sprayed bullets out and hoped, with the assistance of my helpers, I got the kills in time. Adding a findable laser sight would be cool (or at least a weapon with one). My only question is do you have it set so if you spend time on finding weapons, do you lose more people?
As a note to people playing this for the first time... don't spend more or equal time on finding weapons early on. Finding the max number of people will help quite a bit more than maybe getting the next weapon. I made it through the first three days with just the pistol and found a person each day.