World of Goo is a physics-based puzzle video game developed by 2D Boy. Players build structures using balls of goo to reach a goal, navigating various challenges and obstacles in each level. The game features a unique art style and engaging gameplay mechanics that encourage creativity and problem-solving. As players progress, they encounter different types of goo balls, each with unique properties that affect construction. The game includes a story mode with over 40 levels and a competitive mode where players can compare their scores. World of Goo has received critical acclaim for its innovative design and charming presentation.