You should rename this to "bbtan-zombie" since its almost a 100% copy&paste from bbtan except for the zombie theme.
Other than that, its a nice game
well here's a pretty huge bug: rightclick in the game, select "play" from the flash popup menu, and you go to the next stage! How convenient! Do this a bunch of times and you have beat the game
 "Balls vs Zombies"){kind=icon}
 "Little Wheel"){kind=icon}