pretty easy, at least those levels where you have a warmachine. just build those cheap aircrafts and use them to block your rockettrucks or whatever. cpu just sends his forces to die...
use ctrl- to make everything smaller and then squint to produce a third image between the original two. makes things easier, but it is still quite a challange.
i just lost 5 times in a row to reckless and it wasnt even close... and i would consider myself a coutious player. it is hard to believe that the comp isnt cheating.
 "Battalion: Vengeance"){kind=icon}
 "Civilizations Wars"){kind=icon}
 "Bubble Tanks Tower Defense"){kind=icon}
 "Endless Migration"){kind=icon}
 "Run Elephant Run"){kind=icon}
 "ELEPHANT RAVE"){kind=icon}
 "5 Differences"){kind=icon}
 "Turkey Fling"){kind=icon}
 "The Endless Zombie Rampage"){kind=icon}
 "Dreams"){kind=icon}
 "Pel"){kind=icon}
 "Bubble Tanks"){kind=icon}
 "The Company of Myself"){kind=icon}
 "Zilch"){kind=icon}
 "Don't Look Back"){kind=icon}
 "My Pet Protector"){kind=icon}
 "MARDEK RPG: Chapter 2"){kind=icon}
 "LightSprites"){kind=icon}
 "Line Game"){kind=icon}