In the end, the handy dandy Uno (naturally) works. After hours of troubleshooting with programmers, it turned out to be board issues (Trinket Pro, Feather MO). Plants will power LED neopixel strips and neopixel rings creating a moody atmosphere for the living Mycelium, that will itself create the soundscape within the dome.
Oh yeah! All done while listening to Tangerine Dream 😉