Oh cool! What are you planning to use to compose music? I personally use Bosca Ceoil but I'm already starting to feel it's limitations :P It's a really good for game jams though because it's easy to make small melodies with it.
Since this is a TIC-80 game I have to use its internal music editor. But outside of TIC-80 I would like to try Bosca Ceoil as well. And maybe LMMS for something more complex.