Which was later released on consoles, then the company made games like Flower, Journey and Sky (free on mobile platforms). If you're not into gaming, I'd recommend setting a few hours aside to go through Journey at least.
Just tried to find out where to buy it for PC, but could not. This page https://thatgamecompany.com/flow/ has a little PC icon next to the OS ones, but maybe that version doesn't actually exist.