Press and hold L and all four C-buttons until you hear a tone at the character selection screen. Then start your game. You should now be able to select where you want to go at the city preview screen. Press up/down to select country and left/right to select the city.
First select George as your monster. On the first board punch the sign that changes colors when it is on the western scene. Then when you get to San Diego rapidly hit the punch button on the screen that tells you where you are playing.
While playing, eat some toxic waste and you will become VERN.
When the screen shows you what you are going to play next, rapidly hit: jump if you are George; punch if you are Lizzy; or kick if you are Ralph.
Double Points You can double the points you get in certain cities if you press the character button on the screen that introduces the next city. The buttons are:
George Jump Lizzie Punch Ralph Kick
These are the cities that are affected by this.
Casablanca Kiev Kodiac London Moab Nashville Rio de Janerio Washington DC
You also get these effects if you pick up a calculator in any city.