/usr/bin/PikoPixel is in pikopixel.app 1.0-b9b-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/GNUstep/Applications/PikoPixel.app/PikoPixel
/usr/bin/../lib/GNUstep/Applications/PikoPixel.app/PikoPixel