OK now for the comments. You didn't put amount of fans in the equation, you need a mute button, the loading time is lllooonngggg for some reason, There is not replay button at the end, and no high score API. Also some of the boxes have the function thing in them and you have to delete it.
Wow so many questions...
How do you know if you got a heashot?
Can you headshot a dog?
Where are they getting all of their ammo from?!
Are those vampire zombies? 'Cause they seem to only come at night.
How come there's a guy with a sniper behind me, even though I haven't found a sniper yet? I want his sniper!
Well that's it for now I'll love to get answers.