Level select: Press Up(2), Down(2), Left, Right,
Left, Right at the title screen. Then, press 1
or 2 to select a new starting level.
Invincibility: Select Sonic, then hold Up and continuously
jump. Eventually Sonic will begin flashing. Note: The invincibility
will end when Sonic stops running.
Sound test: Press Down(2), Up(2), Left, Right,
Left, Right at the title screen. Then, press 1
or 2 to enter the sound test screen.
Information in this section was contributed by Ed Atkin.
