Meh, scratch my earlier comment. The achievement might be broken, but I still managed to find a solution. I used the Student and went slightly out of bounds.
Ok, wow. Having found the cause of the bug, it's actually really impressive that you earned it with the Student. The issue was, rotating the level broke the achievement until you refreshed the page. So not only did you do it with a particularly hard character, you never accidentally used her special ability, hit a wall, or fell out the side.
 "AntiVillain 1 - Welcome To Chaos City"){kind=icon}
 "Furiosity"){kind=icon}
 "Run 3"){kind=icon}
 "Take my charge"){kind=icon}
 "Fill Tracks"){kind=icon}
 "Earn to Die 2012: Part 2"){kind=icon}
 "ZS Dead Detective - Walls can Bleed"){kind=icon}
 "Medieval Cop 8 -DeathWish- (Part 2)"){kind=icon}
 "oQo"){kind=icon}
 "Chromatic"){kind=icon}
 "yellow"){kind=icon}
 "Hunt Diamonds"){kind=icon}
 "SpongeBob Differences"){kind=icon}
 "Silent Hill: The Haunted House"){kind=icon}
 "Basement of Dead Haunted House"){kind=icon}
 "Golden Cinema Escape"){kind=icon}
 "Red Alert Zombie Apocalypse"){kind=icon}
 "Mystical Fairy Escape"){kind=icon}
 "Fairy Tales Nightmare Escape"){kind=icon}
 "Night Walking Escape"){kind=icon}
That was a trial. This is the canon version. Thanks for playing :D