Level select: Press [Esc] during game play. Then hold E
and start a new game to enable cheat mode. Alternatively, enter
SWAMP THING at the high score screen. Press [Plus]
to advance to the next level or [Minus] to return to the previous
level. Press [Space] to resume game play.
Game editor: Note: Back-up the game disk before following this procedure.
Enable the "Level select" code. Press Up/Left
+ Fire + E to enter the editor. Another way to
enter the editor is to diskcopy the game disk. Place the original
disk in drive A and the copy in drive B. Rename the QAZ.MON file
on drive B to FUSION.TOS. Double click on the FUSION.TOS file
to start the editor. All level changes will be saved to drive
B by pressing Up/Left + Fire + S.