It looks very basic
.
You might want to check out the TuneScope library which should have actual instruments...
I love 8-bit music more than regular music because why not?
But maybe later I should try it.
I didn't know there would be a simple use case for in-built instruments which are pretty much waves...
Wow, very nice retro-style music, great use of the parallel blocks, too, thank you for sharing!
[edit:] Oooh, and I love your "chord" blocks that encapsulate the harmony and theory, this is extremely cool!
here's my own attempt from a while back at something similar, although not the cool retro vibes:
It still looks cool to me.
I really love those projects from both of you. As an older guy I like the retro feel. 
