A little concept I'm going to use in a map that was originally supposed to come out differently. It was good and bad that this came out because it was different than I was expecting.

Press "W" near an object (Besides yourself and supply depots) to move it to your aiming spot. There is a small scenario in which you have to barricade a small fortress from zombies, or else all hell will break loose.

You can move zombies, survivors, and of course, the barricade. There are still a few glitches I never fixed.

You can even do "knock back". If a zombie is attacking you, just move him / her away and they won't bother you. Enjoy.