Does Stage 2's song's bass cut off on real hardware?
There are credits in the ROM, but they aren't shown in the ending. In fact, the code to show them is jumped over; use patch code 2E36:4E714E71 (which nop out the branch around the credits code) to show them.
The ending song was timed to the completed staff roll; as a consequence, you only hear part of the song during normal gameplay. You can hear the full song in the sound test (song 06).
upload the song
Examine the options some more.
Boot up with patch code 1E8A:FFFF to access a debug menu.
- Normal Game – Exit.
- Object Move Test – ?
- Hit Limit – ?
- Scroll Test – Test scrolling on the first level. Hold A to scroll faster.
- Map Position – Test coordinate system. Hold A to scroll faster.
Apparently the only way to exit an option is to reset.
Other ROM Flags
- Setting word 1E88 to any nonzero value makes you both invincible and able to destroy enemies by touching them.