Press the 'LEFT SHIFT' and slowly type "NEM YDID EHT" and press
        'RETURN'.  You'll hear a sound.  Now 'C' will complete your mission.

                                 (LEVEL CODES)
        "AURIGA"  "CEPHEUS"  "APUS"  "MUSCA"  "PYXIS"  "CETUS"  "FORNAX"
                             "CAELUM"    "CORVUS"