In the game you move Yarny through landscapes where toys, plants, and furniture feel huge—like being small in a backyard. Yarny can use his yarn to make ropes, tie knots, pull things, and swing across chasms. Many moves depend on simple physics: if Yarny ties a line and jumps, he can swing like a little pendulum.
As Yarny walks, the thread that makes him slowly unwinds. This makes him shorter and limits what he can do, so you must find balls of red yarn in the scene to refill him. The yarn mechanic is part puzzle and part story, because the creator said the yarn also stands for love that stretches when you move away from what you care about.