84 songs are played into the ears of a full MaleCNS GPU simulation and ranked by the fly's neural response, with a 3D viewer.
FlyWire's 138,639 neurons spike in the browser, play three games and write exactly reproducible bug reports, with no LLM.
The author measures steering vs goal at zero correlation and says so up front.
Paint over MaleCNS neurons to stimulate them and watch walking, turning and escape drives respond; runs in WebGPU.
fruitfly.live names no author; it serves the same Neural Canvas app as Xenova's Hugging Face Space.
One puff of cVA pheromone hits a male (MaleCNS) and a female (FlyWire) brain in your browser: he lunges, she pauses.
A 'what's real here' panel separates traced neurons from modeled behaviour.