Level Select

In the options screen click on password, when you get there choose 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 will see the word levels click on it and scroll down and choose which level you want

Passwords:

Go to Options Screen, and enter the following 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