Select the "Secrets" option from the main menu or pause screen. Enter one of the following codes at the "Enter New Secret" screen. Select the "Secrets" option and set each enabled code as desired.

Invincibility

Enter [Raven] [Salmon] [Eagle] [Bear] [Lizard] [Rabbit] as a password at the "Enter New Secret" screen.

All weapons

Enter [Owl] [Bear] [Owl] [Insect] [Hawk] [Owl] as a password at the "Enter New Secret" screen.

Infinite ammunition

Enter [Salmon] [Elk] [Bull] [Snake] [Eagle] [Salmon] as a password at the "Enter New Secret" screen.

All keys

Enter [Lizard] [Dragonfly] [Bull] [Bear] [Wolf] [Eagle] as a password at the "Enter New Secret" screen.

Warp level 1

Enter [Frog] [Elk] [Horse] [Dragonfly] [Wolf] [Rabbit] as a password at the "Enter New Secret" screen.

Warp level 2

Enter [Owl] [Owl] [Horse] [Elk] [Elk] [Elk] as a password at the "Enter New Secret" screen.

Warp level 3

Enter [Owl] [Rabbit] [Bear] [Insect] [Frog] [Cougar] as a password at the "Enter New Secret" screen.

Warp level 4

Enter [Bear] [Horse] [Raven] [Eagle] [Horse] [Coyote] as a password at the "Enter New Secret" screen.

Warp level 5

Enter [Bear] [Dragonfly] [Horse] [Bear] [Frog] [Elk] as a password at the "Enter New Secret" screen.

Headless mode

Enter [Lizard] [Elk] [Eagle] [Owl] [Salmon] [Horse] as a password at the "Enter New Secret" screen.

Big head mode

Enter [Cougar] [Wolf] [Snake] [Rabbit] [Lizard] [Coyote] as a password at the "Enter New Secret" screen.

Big hands and feet

Enter [Lizard] [Lizard] [Dragonfly] [Horse] [Lizard] [Coyote] as a password at the "Enter New Secret" screen.

Stick man mode

Enter [Horse] [Eagle] [Snake] [Cougar] [Insect] [Salmon] as a password at the "Enter New Secret" screen.

Tiny mode

Enter [Frog] [Frog] [Salmon] [Insect] [Wolf] [Cougar] as a password at the "Enter New Secret" screen.

Mannequin mode

Enter [Snake] [Bull] [Snake] [Frog] [Bear] [Elk] as a password at the "Enter New Secret" screen.

Pen and ink mode

Enter [Jaguar] [Horse] [Elk] [Fish] [Jaguar] [Hawk] as a password at the "Enter New Secret" screen.

Gasping mode

Enter [Dragonfly] [Bull] [Rabbit] [Salmon] [Eagle] [Raven] as a password at the "Enter New Secret" screen.

Gouraud shaded graphics

Enter [Lizard] [Salmon] [Insect] [Salmon] [Wolf] [Dragonfly] as a password at the "Enter New Secret" screen.

Menu madness

Enter [Rabbit] [Owl] [Horse] [Insect] [Bear] [Bear] as a password at the "Enter New Secret" screen.

Full pause screen

Enter [Rabbit] [Owl] [Lizard] [Elk] [Salmon] [Rabbit] as a password at the "Enter New Secret" screen.

View credits

Enter [Elk] [Elk] [Elk] [Elk] [Elk] [Elk] as a password at the "Enter New Secret" screen.

-Some codes from: rush898.net and Wanz22.com