Thunder Spirits Option screen: Hold L + Select and press Start at the title screen. Alternatively, hold Select and press Start at the title screen. The configuration options will allow the number of points for a bonus ship and the starting number of ships to be adjusted. Configuration mode: Hold Select and press Start at the title screen. Special configuration mode: Complete the game, then hold Select and press Start at the title screen when it reappears after the credits. Extra credits: Rapidly tap B at the title screen. Each time a tone is heard, one additional credit has been added to the current total. When the demonstration mode begins, press Start to return to the title screen and continue tapping B.