Enter the following as Passwords... 

ACE		- Makes the game harder
CHICKEN		- Bonus level where you play as an AT-ST
CREDITS		- View credits
IAMDOLLY        - Increases Craft limit
DIRECTOR	- View intermission sequences (new option in Settings menu)
FARMBOY		- Fly Millenium Falcon
TIEDUP 	        - Fly a Tie Interceptor (push up from Millenium Falcon)
IGIVEUP		- Unlimited Lives
MAESTRO		- Music Test
TOUGHGUY        - All powerups
RADAR		- Enhances radar. Ships flying higher are brighter, 
		  ships flying lower are darker
Bonus Levels:

Battle of Hoth 		- Finish all levels with a GOLD medal
Death Star Trench Run	- Finish all levels with a SILVER medal
Beggar's Canyon 	- Finish all levels with a BRONZE medal