GS:Contrast is a game concerned with intangible ideas: the substance of a shadow, and the makeup of a child's broken heart. As a mysterious figure named Dawn, you aid a young girl named Didi in her efforts to prevent her family from falling apart. You don't exist fully in Didi's reality; rather, she is the only person you can see and who can see you. Everyone else appears as a mere shadow projected on the wall, and you yourself have the ability to shift between a corporeal, three-dimensional existence and a silhouetted, two-dimensional one. Contrast conjures up a captivating and surreal mid-20th century European atmosphere of jazz clubs and cabaret singers, and its use of shadows is sometimes striking. But Contrast's puzzles and platforming rarely call for you to do more than go through the motions, and far too often, the roughness of its physics shatters the elegant ambiance of its world.