If you bought the Mega Bit in the shop, then there is a 
block near the entrance of the Red Dozers' Training Course that you can drill down. Below is a door that leads to the Enigma Room where you can enter passwords. There are four numbers that you can drill into and change with 
or 
. Press 
to reset the four numbers and 
to exit. You can go right to leave the area.
Before you can enter passwords in the Enigma Room, you have to unlock the lock with 3852. The order of the digits matter.
- Set the 2nd digit to 8
- Set the 4th digit to 2
- Set the 1st digit to 3
- Set the 3rd digit to 5
If you entered the numbers correctly, they will reset to 0000. You can then enter any password to unlock various things. The order of the digits for the password do not matter. A chest will rise from the platform when a password is entered correctly. If you leave the room, you have to unlock the lock again before entering a password.
Soundstone[edit]
If you have obtained the Soundstone treasure, then you can enter 9434 to unlock the Soundstone option in the Save menu. You can listen to music and sound effects.
Costumes[edit]
Jill's costume can be changed in the Red Dozer Trailer screen. Place the cursor on her and press or . Her sprite does not change.
| Password | Costume |
|---|---|
| 2094 | Cute clothes |
| 5746 | Frog suit |
| 9025 | Drill Dozer coveralls |
| 5854 | Blue overalls |
| 4181 | Thief threads |
| 1419 | Futuristic clothes |
| 2458 | Inspector uniform |
| 2438 | Nurse uniform |
| 2828 | Stylish skirt |
| 5716 | School clothes |
Wallpaper[edit]
Wallpaper changes the inside of the Red Drill Dozer during cutscenes and text boxes. Enter 2403 to return to the default.
| Password | Wallpaper |
|---|---|
| 4089 | Samurai wallpaper |
| 2059 | UFO wallpaper |
| 2403 | Standard wallpaper |
| 8785 | Control center wallpaper |
| 1814 | Rock star wallpaper |
| 5074 | Happy wallpaper |
Full gearbox[edit]
If you have obtained all treasures, then enter 7867 to obtain the Full gearbox. On the Map screen, press + 
to change the cursor yellow. When you select an area, you will start with all three gears. You can press + again on the Map screen to change the cursor back to red.
Hard mode[edit]
Enter 7073 to obtain the Master seal. On the file select screen, hold + and press . The file will display "Hard" if entered correctly. Press the same input to toggle off hard mode. In hard mode, the Drill Dozer only has 1 energy.