Day The End, we did it!
A rollercoaster ride and no mistake, but at the end of it all we have some code we could easily continue to work on, because it hasn't gone all spaghetti.
We even managed a cutscene to set the scene. (Am I the only one who used to think cutscenes were naughty bits that had been removed by the censor? Almost certainly.)
Special shoutout to Edo who DID NOT GIVE UP. That's probably a more important lesson than anything I learned about entity component systems, and certainly a more comprehensible one.
Please play our game and let us know what you make of it. We set out to make this a rhythm game, but early feedback suggests it's become more about reactions. You be the jury.