About this thing.
So, this entry won the whole thing.
You can read about the jury motivation etc at the MS Edge Blog
The actual competition entry site has an old version of the code, which no longer works in some browsers – e.g. Chrome needs to call
AudioContext.resume after a user gesture after playing any audio, which wasn’t a thing in 2016. The code has since been amended (but is still way below 10Kb).