Input the following codes at the 'Password' menu on the Main screen.

Unlock Level 1-1-1: MSW5

Unlock Level 1-1-2: BK8V

Unlock Level 1-2-1: 69NN

Unlock Level 1-3-1: GFVY

Unlock Level 1-3-2: V34K

Unlock Level 2-1-1: 94HR

Unlock Level 2-1-2: ZWLG

Unlock Level 2-1-3: SP??

Unlock Level 2-2-1: KDY3

Unlock Level 2-3-1: Y27F

Unlock Level 2-3-2: 6!2N

Unlock Level 2-3-3: BHBV

Unlock Level 2-4-1: MQR5

Unlock Level 2-4-2: 3YTK

Unlock Level 2-4-3: ?6DS

Unlock Level 2-5-2: 6?SR

Unlock Level 2-5-3: SNJ5

Unlock Level 3-1-1: MNW9

Unlock Level 3-2-1: BF8Z

Unlock Level 3-2-2: 65NS

Unlock Level 3-2-3: YVKK

Unlock Level 3-2-4: KGTY

Unlock Level 3-3-1: SRD6

Unlock Level 3-4-1: Z3ZB

Unlock Level 3-5-1: 9?5M

Unlock Level 3-5-2: FC73

Unlock Level 3-5-3: NL2?

Unlock Level 3-6-1: VXBG

Unlock Level 3-6-2: YWKJ

Unlock Level 3-6-3: GJQZ

Unlock Level 3-7-1: KHP2

Unlock Level 3-7-2: 313K

Unlock Level 4-1-1: ?!JT

Unlock Level 4-2-1: ML17

Unlock Level 4-3-1: YXFC

Unlock Level 4-4-1: GHV1

Unlock Level 4-5-1: VW4C

Level 4-6-1 (Final Level): YX!F


Unlockables
At the Main menu enter the following codes to unlock the corresponding effect.

Start at Level 1-1-1 with Unlimited Lives: M!K3

Start at Level 1-1-2 with Unlimited Lives: YZTP

Start at Level 1-2-1 with Unlimited Lives: MS5W

Start at Level 1-3-1 with Unlimited Lives: BKZ4

Start on Level 2-2-1 with unlimited lives: 94MC

Start at Level 2-2-1 with 6 Lives: SP77