to enable:
open a hex editor and change 0x1F to 0xFF
when the SEGA screen appears, press Option
kaboom debug modus
its fun to mess around with but its weird how theres not even a code to enable it like in most sonic games
also yes tails was going to be playable in this game but just didnt (imagine not being able to fly with yer two tails cough cough Genesis Sonic 2 cough)