update: after giving a super tower over 67200 range (I eventually got it to 2150400) it started shooting at the creep. I then waited about 2-5 minutes for the bullets to catch up to it and beat the level.
Everything was going good, then a regenerating creep randomly flies through my turrets like a ghost and goes over the endzone. It didn't count as a point against me, but I was unable to complete the level because it was technically still alive.
i'm with retro. way too easy, no variety or change in difficulty (just takes longer), and some of the levels have more than one solution. I'm only on 25. This badge is going to take forever.
 "Bubble Tanks Tower Defense"){kind=icon}
 "Dolphin Olympics 2"){kind=icon}
 "Ultimate Assassin 3"){kind=icon}
 "loops of zen"){kind=icon}
 "Enigmata"){kind=icon}
 "Canabalt"){kind=icon}
 "You Have To Burn The Rope"){kind=icon}
 "Meat Boy"){kind=icon}