Here is the information on the SONIC:PROJECT NEEDLEM0USE and X-Siblings projects as of now.

Each X-Siblings has their own area that is based on or inspired by levels from the Sonic games. Green Hill like level-Sonic.EXE,Forest like level -Nicky.EXE,Industrial like level-Tails.EXE, Casino Night or Spring Yard like level-Amy.EXE.Winter Forest -Rosy.EXE,Ancient ruins like level -Knuckles.EXE,Deserted like level-Fang.EXE,Junk like level-Mighty.EXE,City like level-Ray.EXE.Marble zone like level-Needlemouse.EXE.Castle-All.Before becoming who they are now—EXE versions of Sonic and his friends—the X-Siblings were once human: Japanese *doujin* game developers. They were a ten-person group known as "the Fun Gang" and had a track record of creating games for various platforms of that era (the 1990s), including titles featuring Sonic.Satoru(X)and Shizuka (Sarah,SN) were lead programmers with experience working at a small game company.SONIC: PROJECT NEEDLEM0USE is their flagship project.Their victims are Fox-Boy (Tails parody in Sonic level), Striker (Knuckles parody in Knuckles level), and Dr. Scramble (Dr.Eggman copy in Castle level)Speedy(Sonic parody in Tails level),Lizy(Amy parody in Amy level),Pinky(Cream parody in Rosy level) Zipper(Cat in Needlemouse level),Smarty(Raccon Dog in Nicky level),Rocky(Mouse in Ray level),Speedster(Purple an Yellow fur rabbit in Mighty level)Acro(dog in Fang level).