Nape Games,
I'm glad to hear that you want to use my music in an NES game! Since your team is building to authentic hardware, I can send you the NSF and FTM files if you need them; just give me an email address to send them. My music uses all five channels of the soundchip, so you might need to make changes to make room for your game's sound effects.
Thank you very much,
- Jonathan So