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. The title screen has a “PRESS START BUTTON” prompt.The title screen lacks a trademark symbol.The “Sonic Team Presents” screen is completely absent.The SEGA scream is absent and isn’t present in the ROM. The prototype uses a standard SEGA title screen commonly used in other games.The proto is confirmed to be sourced from a UK Magazine of the time.The ROM header hasn’t been populated with game specific information yet.
