The Achilles level by Joel was ridiculous. I repeatedly hit the bombs and the dominoes would fall to the target and wouldn't kill it. That happened around 10 times.
Game glitched and the zombies froze on screen and the wave timer stopped so since I was fully upgraded I just repaired the truck and it unfroze right before I grabbed the pump.
Did you know it is illegal to say I want to kill the president of the United States. One thing that technically is legal to say is "We have a group that meets Fridays at midnight under the Brooklyn Bridge and the password is sic semper tyrannis"
Got to level 20 score 7,742,882. I went on to their site for the extra 5 skill points and leveled up accuracy, fire rate, and burst first. Accuracy is important for knocking down those towers from a far also it raises damage. After I got those up I maxed out missiles and got missileburst pretty high. Then after all that I put some in splintershells and siege. Stayed away from active skills until the end when I tried putting some in frenzy, but then died. Hope that helps.
 "Chance A Lot"){kind=icon}
 "Arkandian Revenant"){kind=icon}
 "Crush The Castle 2 PP"){kind=icon}
 "Go Go Agent Zero!"){kind=icon}
 "Dude and Zombies"){kind=icon}
 "Zombies in the Shadow: The Saviour - Act2 - V1.2"){kind=icon}
 "Soviet Rocket Giraffe Go Go Go!"){kind=icon}
 "Zombie Knight"){kind=icon}
 "Diamond Hollow"){kind=icon}
 "Vampire Physics"){kind=icon}
 "Chisel"){kind=icon}
 "Elephant Quest"){kind=icon}
 "Monster Castle Defense"){kind=icon}
 "Tentacle Wars. The Purple Menace"){kind=icon}
 "Kill Justin Beaver"){kind=icon}
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 "Darkest Days"){kind=icon}