Also potentially interesting to this crowd are the underlying editor, which I split out from the online Dusa editor and called "sketchzone" (https://github.com/robsimmons/sketchzone). Some of my motivations and hopes for sketchzone are blogged here: https://typesafety.net/rob/blog/endless-sketchzone
Also, I more-or-less did Advent of Code 2024 in Dusa: journal entries and links to solutions are at https://typesafety.net/rob/blog/advent-of-dusa-2024
Zig was also apparently partly developed whilst Andrew Kelley was there. Fun place.