Seicross Continue game play: Hold A and press Start at the game over screen. Invincibility: Hold Left + A + B on controller two and press Up(2), Down(2), Start on controller one at the title screen. Adjust difficulty: Hold Left + A + B on controller two and press A on controller one at the title screen. Level select: Hold Left + A + B on controller two and press B on controller one at the title screen. Level skip: Hold A + B on controller one and press Left on controller two. Invisible bike: Hold Left + A + B at the title screen.