Illusion Labs has released an update to Labyrinth 2 for the iPhone and iPod touch, adding integration with Apple’s new iOS 4.1 Game Center and support for Retina Display devices. Labyrinth 2 provides a virtual version of the classic ball-in-maze puzzle game where players must use their device’s accelerometer to tilt the playing field and roll their ball through a maze and around obstacles to reach the goal. The game includes advanced features…