Invincibility
Press [A]x4, [Up], [Down], [Left], [Right] when the word "Start" appears on the title screen. A chime will confirm correct code entry. Hold [B] and press [Start]. A second chime will be heard. Hold [C] and press [Start]. Begin game play with invincibility enabled. Note: You will still be harmed by falling, being grabbed by a green hand on level 4, and being stepped on by Loki. (The alternate version of this code is to press [Up], [B], [Down], [B], [Left], [B], [Right], [B] at the title screen until the chime confirms correct code entry. Then, hold [B] and press [Start] to begin game play.)
Japanese mode
Enter the options screen. Choose "26" for the music and "56" for sound selections, then hold [Down/Left] + [A] + [B] + [C] + [Start].
Bonus points
There is a key at the end of every level. Position your knight just to the right of the key, then jump to the left. With the proper timing, you can take the key as you begin your jump for 5,000 bonus points.
Slow motion
Enable the "Invincibility", "Japanese mode" or "Level select" codes and press [Start] pause game play. Hold [B] to resume game play in slow motion. (The alternate version of this code is to press [Up], [A], [Down], [A], [Left], [A], [Right], [A] at the title screen. A chime will confirm correct code entry. Pause game play and hold [B] to resume in slow motion.)
Level select
Press [[Up], [Down], [Left], [Right]] repeatedly at the title screen. The sound of a harp will confirm correct code entry. Enter one of the following controller actions to select the corresponding level. Press [A] instead of [Start] to begin at the second half of the corresponding level. Note: To enable these codes along with any other cheat code, allow the demonstration mode to cycle once before entering the other codes.
| Level | Code |
| The Execution Place | Press [Start]. |
| The Floating Island | Press [A], [Start]. |
| The Village of Decay | Press [Up], [Start]. |
| Town of Fire | Press [Up] + [A], [Start]. |
| Baron Rankle's Tower | Press [Down], [Start]. |
| Horrible Faced Mountain | Press [Down] + [A], [Start]. |
| The Crystal Forest | Press [Left], [Start]. |
| The Ice Slopes | Press [Left] + [A], [Start]. |
| Beginning of Castle | Press [Right], [Start]. |
| Middle of Castle | Press [Right] + [A], [Start]. |
| Loki | Press [Down/Right], [Start]. |