I've got a couple notes. I kinda included everything, not really knowing what's actually playable. Case in point, the... ascending 32nd-note line at the end. If there's something inventive we can do with that, it's there so we know what we're working with. If not, I'll just remove it. Easier to remove it than to go back and add it. Besides, not all the extra parts play every loop in real gameplay due to interruption with sound effects.
Oh, and the "q = 98, 112, 126, 140" is a note for me so I wouldn't forget to ask about it. The tempo featured in the YouTube video is the slowest possible in the game. However, throughout, the game instanteously (over the course of a measure, I think) switches between 98, 112, 126, and 140 depending on the in-game score. I'm thinking just including the 98-140 range would be best, but I dunno how to do that. [I recorded some sound directly from my Game Boy, if you wanted to back me up there. It also demonstrates sound effects clipping into the music.
Parachute starts at 0:16.]
https://youtu.be/FZVNChXTvo0