Congrats, that looks awesome.
I've learned a couple things while trying to mimic the neopixel feedback.
RPI USB audio and neopixel controlled over pwm pin do not work together, at least for me so far. You can do one or the other but not both at the same time. I have 3-4 workarounds to try but just haven't gotten to doing it.
I was so close getting it working on a seperate pi zero talking over osc. I spent a couple days at least trying to do some updates to the pi to install some dependencies.
The updates kept failing, in conclusion I believe it was due to a corrupt sd card.
I'm not giving up on it I just need to dedicate more time to trying.
Thanks for your help Colin pointing me in the right directions.
Now its almost finished, hopefully you can take some time to play and enjoy it when its done.