this is a good one, I like the way you have an underlying pattern holding things together and then multiple different parts coming in & out,
The others have already given you better advice than I can on how to write in the bossa nova style, but one thing I would say is there were a couple points where things felt a bit busy/chaotic? Like I said I do like the way there's a lot of different parts coming in and out but I think there were a couple places where there were a few too many conflicting things happening at once.