besy guide to make cash is to get the "suicide vest" for those of you who kn ow what im talking about, then give a human that vest and put him in his own column, play level 2, act 1 and he will end the fight almost as when you start. easy 200 cash and can replay as much as possible. honestly its faster than replaying level one over and over again.
omg i have a new challenge. on the first level you have to make a rocket around the enemy's planet and kill him without moving your guy. took me 20m but but i did it =]
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