Bug!

Go to Help, then About Bug. 
Hold down the SHIFT key and click Bug’s right
pupil. A screen should appear. Type “babyseals”
and press Yikes! or Wow! (NOT OK!).
Press to the right of Help and a cheat
menu should appear.
Flying bug = Activate the cheat menu, select cheat,
        then hold y in gameplay.
Level skip = Activate the cheat menu, select cheat,
        press duck up or to skip down duck+down.
Kill Sonic = In reptilia use the the flying bug cheat and
        fly around until you see rocks shaped like
        “GO"and a track with Sonic on it.