Cardgames.ioIt only took 11 years, but face-down cards now automatically flip themselves face-up when playing #solitaire. This daring code change took me all of ten minutes, a truly Herculean effort.
El oscuro@cardgames_io as the architect of a major website like cardcames.io, I can tell you that you must have been sweating that change. Updating the core functionality of a website might cause some weird breakage and potentially bring everything down. :)