This port is on the right track, but there's a few issues that prevent me from accepting it.
First, overall, the port sounds very choppy. This is due to some notes being split into two, where it's not the case in the original. I also notice that you've put rests after every note on channels #0 and #1. An easier way to do this is to remove the rests, and use the qXY command. The X in there shortens the durations of all the notes. Check the AddmusicK readme for more information.
Second, the channel distribution is weird, for several reasons. First, channels #2 and #3 could be merged together, since they never seem to play notes at the same time. Doing this would also allow you to move the percussion away from channel #6, and therefore prevent sound effects from cutting it out. Second, channel #0 and #1 seem to be clones of each other. Instead of rewriting everything because it's at a higher octave, you can copy the octave from channel #0 and put $FA $02 $0C before it to boost every note in the channel by an octave automatically. This will save a lot of space.
$FA $02 $0C
Just make sure to bring everything back to normal with $FA $02 $00 if needed. Check the AddmusicK readme for more information.
One more suggestion: if you've got channels whose notes are identical, then you should place the less noticeable one on channels #6 or #7 so the sound effects don't cut out a more important part of the song.
Finally, there are some extra notes that don't seem to be in the original song on channel #2 right before the loop point.