Paperboy

Cheat mode:
To enter the cheat codes, select "Options" from the main menu, then select the "Secret Codes" option. Select "New Code", then use the "Type-Matic" to enter one of the following codes.

Invincibility:
Enter INVINC as a code.

Unlimited papers on all levels:
Enter NOBUNDLE as a code.

Level select:
Enter MAXSUBS as a code. After this code is activated, enter the Alice's RV Haven level. The game will automatically mark the level as completed. Exit the level to unlock all remaining levels in the game.
Information in this section was contributed by ese788e2iyh.

Bonus levels:
Enter OBVIOUS as a code.

View all headlines:
Enter HEADLINE as a code.

Big newspapers:
Enter SUNDAY as a code.

Super jumps:
Enter MOON as a code.

Super Jump Springs:
Enter ALLJUMP as a code.

Rocket Boosters:
Enter GOFAST as a code.

Turbo mode:
Enter RUSH as a code.

Slow motion mode:
Enter WAKING as a code.

Random paper tossing:
Enter RANDOM as a code to hit the nearest object that will react (such as a homing device) on a power throw.
Information in this section was contributed by Steve Gano.

Frame-by-frame mode:
Enter UNTIMED, then press C-Right to advance to the next frame.

Invisible obstacles:
Enter JUMBLE as a code.

Screaming obstacles:
Enter SCREAM as a code.

Throw papers backwards:
Enter BACKWARD as a code.

Throw papers directly in front of character:
Enter FRONTS as a code.

Throw papers at 90 degree angle:
Enter SIDES as a code.

Small paperboy:
Enter LITTLE as a code.

Near-sighted mode:
Enter MAGOO as a code.

Cartoon sounds:
Enter THUMP or THUNK as a code.

Hint: Increase number of papers without getting bundles:
Whenever you lose control of your character (e.g. before you start a level at the "Ready...Set...Go" screen or while you are crashed) rapidly press Z, L, or R. Every time one of those buttons are pressed, the amount of papers you have will increase.
Information in this section was contributed by Billy Meabrod.

Hint: Shoot papers everywhere:
When in mid-air press the Analog-stick Left or Right and shoot papers.
Information in this section was contributed by Douglas Fletcher.