This is technically an “Act 4” for Green Hill Zone, and was most likely a way to test the ending area used before the end credits in the final game.
There is no code for a level select cheat. For the final version, a level select code is used instead (UP, DOWN, LEFT, RIGHT, A+START). Level select can be activated by pressing A+START on the title screen.Sonic’s palette on the title screen is slightly brighter in comparison to the final build.This is absent in the final version, even though it’s still present in the game’s code.
GAMES RELEASED EVERY MONTH - Download them all! CONTROLLER SUPPORT - HID compatible controllers
CONTROLLER SUPPORT Sonic The Hedgehog on Android offers exclusive support for the Power A Moga, Nyko, XBOX, and all HID controllers. Use their unique abilities to fly, climb, and glide around levels offering exciting new ways to explore. NEW PLAYABLE CHARACTERS Play as Sonic’s friends Tails and Knuckles for the first time. GOTTA GO FAST - Challenge yourself with an all-new Time Attack mode OPTIMIZED FOR MOBILE Sonic The Hedgehog now plays in widescreen at a smooth 60FPS offering unrivalled performance and the game’s legendary soundtrack has been fully re-mastered.
Sonic the Hedgehog joins the SEGA Forever classic games collection, a treasure trove of free SEGA console classics brought to life on mobile for the first time! Run and spin through loop-de-loops as you collect rings and defeat enemies on your mission to save the world from the evil Dr. Race at lightning speeds across seven classic zones as Sonic the Hedgehog. The Sonic game that started it all is now free-to-play and optimized for mobile devices!