Enter these in the password screen.

Password	Effect
HQSUP	Go to 2nd level.
HKFBM	Go to 3rd level.
QJWLX	Go to 4th level.
YTWKN	Go to 5th level.
QKSVC	Go to 6th level.
QHHJS	Go to 7th level.
WWKJQ	Go to 8th level.