Warp Levels, coined by stop1it because of its characteristics. A warp level is relatively harder to the levels that a player will skip. One might think of letting the player skip more levels if he/she did the warp level as a form of reward for completing the warp level.
The warp level was first seen in aapl2's second version of Cityscape, where an extremely hard level comprising of Lottery Paths, arrow blocks etc., is found at the start of the world. If completed, the warp level will warp the player to floor 10.