About the t78 tempo, I originally had it at half the tempo, however I noticed this lengthens the 'cut-off' between notes (for lack of a better term) - there always seems to be a brief pause between notes even with maximum sustain, infinite release, with or without staccato. With the flute instrument this was very noticeable with lower tempos, whereas with higher tempos it sounds much closer to the original. I'm not sure how to fix this issue otherwise (apart from with legato, but that's not the effect we want here).
A few tiny notes. First, I'd strongly discourage using any tempo value higher than around t60. t78 is passable, but it creates some slight slowdown following the timer's tempo hike. One way to fix this is to halve the tempo, and then halve every note length in the song. Even though it would sound the same, this puts less strain on the sound engine, and therefore reduces lag. (Previous versions of AMK had #option halvetempo, which did it automatically for you... but it doesn't work anymore so rip.) Now, making you manually do this would frankly be a waste of time, especially since it's not super egregious, but for your future ports, I'd suggest manually halving the tempo and note lengths if possible.
As far as the submission goes, make sure you include the insert size (which can be on AMK's insertion success screen, or in the stats folder), and stick to tags that are on the official tag list.
Minor issues aside, this is a pretty neat port, nice job!