I was messing around with friends on Discord around 4 years ago during lockdown, and it hit me you could write a minesweeper message using discord spoiler tags, so I whipped something up in an hour or two and hosting it on github pages, shared it on a couple of servers I was in, and it's still getting traffic regularly
https://igniuss.github.io/det-cord/
It was fun streaming the work to friends who aren't in the IT sphere, some are now studying to get in the industry