For anyone who thinks its impossible,
Search for buildings that have both Survivors, and hunting rifles.
The hunting rifle will down anything you headshot, and most Zombies in one shot.
I got through the game losing 5 survivors in stage one, and still beat it fairly easily, My base only took 6 points of damage the entire game
Maybe add a revive effect. Because when one teammate gets down and everyone else is standing around waiting. Its very annoying to wait for the respawn. Maybe a way to revive your teammates if you are standing close to them>
I see a lot of people complaining that this Game needs have more in it, that you should be able to change tones and percussions and add instruments. Remeber This is only a game. If you want a real synthetic track program there are places to get them
On the last level, 35, flip the cop car into the hole, make sure it is upside down.
Then push the wheel onto the cop car. The cop car has to be turned on.
So the cop car will begin to rotate the giant wheel on top of him. Then use the ambulance to push the box on the wheel. the wheel spinning will make the box shoot off and hit the button.
It might take a couple times, but that is how the walk through showed it