Stages 1 and 5
From Video Game Music Preservation Foundation Wiki
As the title suggests, Stages 1 & 5 plays as the background music for stages 1 and 5. However, in the Japanese release of the game, this song plays in stages 2 and 5.
This song is track 1 in the NSF file.
- youtube.com/watch?v=AzFBwfrIRnQ - Metal remix by Thell.