10,000 points are awarded if full energy is remaining after defeating the Boss of any level. For each additional Boss defeated with full energy, the point bonus is doubled.
Continue game
Hold I + II, then reset the game at the title screen. Repeatedly tap or hold Down/Left + Select until the phrase "Continue Mode" appears. The number of continues allowed is equal to this formula: (Score/1,000,000) + 3.
Difficult Mode
At the title screen, press I + II and then quickly press RUN + SELECT to reset the game. Immediately hold RIGHT + DOWN + SELECT until the title screen appears. "DIFFICULT MODE" will appear on the screen if done correctly.
Easy mode
Hold I + II, then reset the game at the title screen. Repeatedly tap or hold Up/Right + Select until the phrase "Continue Mode" appears. In this mode, power and the units awarded at the end of each level is doubled.
Music test
Hold I and reset the game during game play, or hold I and reset the game at the title screen. Repeatedly tap or hold Up/Left + Select until the title screen appears. Note: Reset the game to return to game play.
Self Destruct
To kill yourself, pause the game and press Up, Up, Down, Down, Left, Right, Left, Right, II, I.
Boss bonus...