ok so i finally "emulated this properly" - by that i mean, i played it on a 3ds.
gameplay is fun, the harder difficulties are rlly hard for me but they pay off with how funny it is to miss notes. i love the crusty sound of the gba and that's awesome but missing the notes in this game is the best part of it.

this was one of the funniest experiences i've ever had with a game.
...i suck at it. it was really funny.

i'll emulate this properly eventually, lolz