| Code: | Result: |
| Hold Shift, PgUp, + during play to make Harry large and in charge. | Large Harry |
| Hold down Option key when selecting a new game. | Level Select |
| Type 'x' on the title screen for a hidden message. | Secret Message |
| Type ''wavygravy'' during play to create waves on the screen (type again to remove) The requires a PowerPC. | Waves |
