Garfiled - Caught in TV Land cheats and cheat codes for PC

Level Select
Go to the options screen and click on password.
Select Garfield on the left one, the monster guy
on the middle one, and the mouse with cheese on the
right. Press ENTER at the top of the screen you should
see the word levels click on it and scroll down and
choose any stages.

Passwords
Go to Options Screen, and type the following 
cheat codes under Passwords:

Level 2 - Garfield, Odie, Granny
Level 3 - Chicken, Jon, Bear
Level 4 - Monster, Arlene, Mouse
Level 5 - Odie, Bear, Arlene
Level 6 - Jon, Granny, Garfield
Level 7 - Mouse, Chicken, Monster

Invincibility mode:
After entering the multi-command, pause the game play, after press 
[Jump]. Now you can do anything but die or kill. To get out of this state, 
press [Shoot].