tips on killing zombie: tip 1: dont mistake a zombie for a normal person...or vise versa tip 2: if they are lying on the ground and u dont remember killing them give them a bullet to the head and see wahat happens tip 3: dont bibricate them (cut them in half) it only makes things worse and more disgusting
i just beat 101 with all lifes left. Join the two paths together at the start (use trees and for xtra damage give them triggers) then do what u like. An awesome combo i have was too make a swing log hit across a pile of coals reach a tree, get hit up, hit with another log into pit fall which is right next to it. It's awesome because when they get out they are hit right back in if u do it right, and that happens until they die and for added bonus more people pile in while the first guy is being killed XD. I used that trick until i reached the bottom then i just whatever could fit in there (lots of rolling logs) then filled the gaps with cannon towers HOPE I HELPED.
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 "Absorption"){kind=icon}
 "Castaway 2"){kind=icon}
 "Rebuild 2"){kind=icon}
 "GunBlood"){kind=icon}
 "Happy Wheels"){kind=icon}
 "Frontier"){kind=icon}
 "WarLight"){kind=icon}
 "The Last Stand: Union City"){kind=icon}
 "Epic War 5"){kind=icon}
 "Pirate Defense"){kind=icon}
 "Bieber Bottle Bash"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "Dont Whack Your Teacher"){kind=icon}
 "Raptor Jesus VS Chuck Norris"){kind=icon}
 "World Basketball Challenge"){kind=icon}
 "The Soul Driver"){kind=icon}
 "Dude and Zombies"){kind=icon}
Level 3 has New Zealand - the first two levels are like tutorials so the map is small.