Sonic Lost World Sega Genesis Game Cart Repro

Up for sale is a really cool Sonic 2 hack which introduces you of the levels that were left out of the original Sonic 2 during development. Here is more info:
-Levels-
Dust Hill Zone - Uses graphics similar to the mockup screenshot of Sand Shower Zone, which was at the time thought to be Dust Hill Zone.
Rock Zone - The music is Mystic Cave Zone 2 player.
Wood Zone - The music is the beta version of Metropolis Zone
Winter Zone
Hidden Palace Zone - Background music is the intended music for the level. Mystic Cave boss is used with the only alteration that the sequence of picks and rocks is omitted. Also, the bat badniks are utilized, which ended up being unused in the final Sonic 2
Casino Night Zone (Sonic 2 Beta style) - Music is the beta music
Cyber City Zone - The music is 2 player Casino Night Zone
=Known Bugs-
Hidden Palace : Accessing and Beating or losing in a Special Stage causes some sprites to Glitch at Stage ending .

Game has been tested on an original Sega Genesis console and works flawlessly.
Thank you for looking and let me know if you have any questions. Be sure to check out my other listings.