For this specific HN post, speedrunning is a bit of a misnomer. He used similar tooling to effectively add support for a physical keyboard and additionally a bunch of keyboard shortcuts that are capable of inputting custom text, songs, and fabric patterns.
There’s a YouTube video where the author showcases this. It’s pretty short and a really interesting watch: https://youtu.be/Yw8Alf_lolA
I found the speedrun page, looks like it’s mostly paying off debts or collecting special items https://www.speedrun.com/acnh
For this specific HN post, speedrunning is a bit of a misnomer. He used similar tooling to effectively add support for a physical keyboard and additionally a bunch of keyboard shortcuts that are capable of inputting custom text, songs, and fabric patterns.
There’s a YouTube video where the author showcases this. It’s pretty short and a really interesting watch: https://youtu.be/Yw8Alf_lolA