Sentouin Yamada Hajime is a very obscure game only released in Japan.
Sound Test#
Code 030033B5FF will start the game in a sound test. The screen will be white; however, the controls are simple. Press Left or Right to change songs, press A to play. Press B to stop the current song. Sound effects can be accessed by pressing Down. Interestingly, ROM text for the sound test can be found at address 0x1A9ECC.
SoundTest
Debug Menu Text#
Located at 0x123CFC is text for a debug menu which does not exist.
ADV.........................ALL....................... ........
(DEBUG). ........... ........ .>...-...
..ACT1....ACT2....ACT3....ADV1....ADV2
(Source: nensondubois)