It is a good game, but slightly flawed. (for example: the Vulcan Turret's first upgrade costs $15, while the second upgrade costs $10, and the third $20.)
@ kyubi, go to http://www.kongregate.com/pages/9-secret-words-challenge, and it talks about the word challenge. If you scroll down to the bottom of the page, there are profiles (characters, beasts, etc). Search on those profiles, and on those pages you can find the word.
 "Robot Wants Puppy"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}
 "Civiballs"){kind=icon}
 "siftheads 5"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "Xeno Tactic"){kind=icon}
 "Another Weird Ordeal"){kind=icon}
 "I Love Traffic"){kind=icon}
 "Wake Up the Box"){kind=icon}
 "Obey the Game"){kind=icon}
 "The Several Journeys of Reemus: Chapter 3"){kind=icon}
 "Frontier"){kind=icon}
 "Johnny Rocketfingers"){kind=icon}
 "Feudalism II"){kind=icon}
 "Jumping jack stick figure"){kind=icon}
 "Thing-Thing Arena 3"){kind=icon}
 "Little Wheel"){kind=icon}
 "Cosplay Craze"){kind=icon}