Level passwords:
Scene 1 completed (easy difficulty)

Y W -
- - -
D - -

Scene 3 completed (easy difficulty)

D--
---
D--

Scenes 1, 2, 3, 4 completed (Easy Difficulty)

- - Y
- - -
Y - -

Scene 1 completed (normal difficulty)

D D D
- - -
Y W -

Scenes 1, 4 completed (normal difficulty)

- - -
Y - -
Y - -

Scenes 1, 2, 3, 4 completed (normal difficulty)

W Y -
Y - -
- Y -

Scenes 1, 2, 4 completed (hard difficulty)

W W D
Y - -
- W -

Start at last scene

- - Y
- - -
Y - -

Unknown

D Y D
- - -
D Y -

Key

D:- Dot
W: Wakko
Y: Yakko
Dash: Empty

Hint: Secret game in scene 1:
Play scene 1 until reaching the mine cart area. Ride the mine cart to find a red X sign. Jump on the yellow wall with the ladders as if you were going to exit, but do not actually exit. Jump down the right-hand side of the wall and collect the stars to be transported to the secret game.

Hint: Secret game in scene 3:
Play scene 3 until reaching an area where there are wooden steps, and fire at the bottom. Jump on the steps until reaching two steps next to each other. Then, jump on the step that is next to the stone wall and intentionally allow yourself to fall. Your character will fall on a rock next to a star that is over some fire. Jump across the fire and walk though the passage to be transported to the secret game.