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.