A Nightmare on Sesame St. cheats and cheat codes for PC

Skip any level:
Press the indicated letter at the title screen to jump 
to any of the levels bellow:

Press A - Jump to Level 1 
Press E - Jump to Level 2 
Press I - Jump to Level 3 
Press O - Jump to Level 4 
Press U - Jump to Level 5 
Press Y - Jump to the hidden level
(the letter Y is sometimes a vowel)

Control both Ernie and Bert with one keyboard/joystick:
Press Ctrl-Y at the start screen and set the controls for both players 
the same (i.e. have both of them use Joystick 1) then start a two 
player game to control both characters:

Second Weapon:
When playing a single player game with a joystick, press player two 
button #2 (Ctrl is the default) and a second stationary weapon will 
appear in the middle of the screen. Press player 2's button #2 to 
cycle through the weapons.