https://wccftech.com/headed-south-is-the-first-ever-game-that-the-pixel-4s-motion-sense/

Motion Sense is arguably one of the most talked-about Pixel 4 features. Although it may seem a little gimmicky, it revolutionizes how one interacts with a smartphone and opens up a world of possibilities for developers. It turns out that Motion Sense is useful for more than just basic app navigation, as demonstrated by Headed South. The game is developed by the same people who made Monument Valley, in collaboration with Google.

A collaboration between Google and ustwo Studios, Headed South is an experience that introduces Google’s new Quick Gestures to users in a playful and engaging way.