checked-no =>Power Up: Once per level, press [START] to pause the game, then press U U D D L R L R B A [START] to be powered up. =>Continue: Press D U B A B A B A B A on the "Game Over" screen when the music starts to play. =>Level Skip: Kill the enemy ship at the end of each level within 5 seconds to skip ahead 1 level. =>Secret Message: Hold CNTRL II: A+B and reset the system. Keep holding the buttons to make a secret message appear.