Difficulty - Legendary Iron Checkpoints - None The abbreviation BT at the beginning of this level's title stands for "Bunny Track" BT levels are designed to test players maneuverability. Different BT maps have different difficulty settings, which are based upon how long the track is, how hard the jumps are, and how many checkpoints there are, if any. This Map has no checkpoints. --- -IMPOSSIBLE DETAILS- The map is appropriately named. This level has 7 rooms, and no checkpoints. If you die, you start from the beginning again. This map is specifically designed to be deceptive. Sometimes what appears to be the right way will lead you to death. Other times it's simply a guessing game. This map will test your maneuverability in all sorts of fashions, as well as test your wit in how to finish each room. As the in game description so appropriately says... Good luck!.. you'll need it. Some screenshots.