Submitted 
                  by: Unknown
                This 
                  is all that remains of "The Desert Level", a zone 
                  that has never been playable in any form. Many things are wrong 
                  with the picture. Firstly, the position of Sonic on the screen 
                  is far too right; secondly it is using the Sonic 1 Sonic style. 
                  Most likely this was simply a mock image of what the level could 
                  look like, with inserting sprites in different sections without 
                  having anything moving. One thing that fascinated many was the 
                  Crocodile head at the far right. The crocodile robot and its 
                  animations were eventually found in the Sonic 2 BETA ROM. 
                In 
                  the Sonic 2 'Beta', Mystic Cave Zone is under the name "Dust 
                  Hill Zone". It is theroised that This Desert Level was 
                  named "Dust Hill", but was deleted early in production, 
                  and was just never changed to "Mystic Cave".
                At 
                  the moment it is unknown what the real answer is, due to the 
                  flakey memory of the original creator, Brenda Ross.
                Another 
                  interesting fact was that most of the graphics for the level 
                  that were created by Ross were made so that they could be interchangable 
                  with a 'Winter Zone' palette. Neither level got even close to 
                  becoming part of the final game.