one of the first few to get the badge, easier than the other ones
Factory Ballin' Badge
(15 points - 345 awarded)
Complete all 30 levels
You acquired this badge on Feb. 16, 2010.
at level 25: right upper corner, then left lower corner, then right lower corner, then lower middle.
i tried this a few times and it works, without fails
 "The sexy green button: RESIST THE URGE 3"){kind=icon}
 "The Final Death Wish"){kind=icon}
 "Robot Wants Puppy"){kind=icon}
 "VVVVVV Demo"){kind=icon}
 "Factory Balls 3"){kind=icon}
 "Elements"){kind=icon}
 "Hedgehog Launch 2"){kind=icon}
 "I Remain"){kind=icon}
 "Battalion: Vengeance"){kind=icon}
 "Duck, think outside the flock"){kind=icon}
 "Kaleidoscope Reef"){kind=icon}
 "Bubble Tanks Tower Defense"){kind=icon}
 "Icebreaker"){kind=icon}
 "Blosics"){kind=icon}
 "Shootorial #1: ActionScript 3"){kind=icon}
 "StarShine"){kind=icon}
 "Z-Rox"){kind=icon}
 "Shootorial #0"){kind=icon}
 "Typing Ninja Hunter"){kind=icon}
 "Smileys-War"){kind=icon}