https://en.touhouwiki.net/wiki/Patchouli_Knowledge

And then yeah he's playing a Touhou rearrangement in the project intro video. "Original: ZUN".

I wholeheartedly support weebs who create useful open-source electronics and share them with the world.

I'm always happy when I see Touhou mentioned on HN. It's reasonably popular with a certain subset of hacker types that grew up in in the 2000s