Invaders Autopilot: https://susam.net/invaders.html#auto
The autopilot is written in 108 lines of code using a heuristics-based algorithm: https://github.com/susam/invaders/blob/0.9.0/invaders.html#L389-L496
The game has music too, but browsers require user interaction to play it. To hear it with the autopilot, click the "↵" button twice and wait 5 seconds.
I hope this is fun!