as a fan of mindless shooters and defense games both, I am happy to see a new spin on TD games. fun, entertaining and simple: everything a flash game should be.
to flameblade66: realistic? let me know when you see a real zombie and we'll talk :-) it's a staple of video games that as one progresses enemies take more hits to die. it's a proud and noble shooter tradition.
 "Bunny Charm"){kind=icon}
 "Spewer"){kind=icon}
 "Mastermind: World Conquerer"){kind=icon}
 "Endless Zombie Rampage 2"){kind=icon}
 "Xeno Tactic"){kind=icon}
 "Arachnophilia"){kind=icon}