checked-no =>Stage Select/Extra Lives/Extra Credits and MORE: Highlight the System Config option on the select screen, hold [R] and press B. When the system config screen appears, press CNTRL II: [L]+[R] - a tone will sound and the special environment options will appear (5 ships, 9 credits). Now, hold CNTRL II: A+B+X+Y in that order - a tone will sound and a stage select option will appear. Finally, press CNTRL II: [START]+[SELECT] and when the tone sounds you can increase your ships to 30 and credits to 99, as well as beginning in any of the game's 8 missions. =>Hidden Level: In stage 2, you will see a small red rectangle on the top of the screen. Fly into it to warp to a hidden stage.