Geometry Dash is a rhythm-based action platformer created by Robert Topala (RobTop) in 2013, where players guide a cube through obstacle-filled levels synced to electronic music. It's famous for its fast-paced gameplay, unforgiving difficulty, and massive community of creators who design custom levels. Geometry Dash has built a huge global following, with over 100 million players. It's not just a game but a creative platform — many fans treat the level editor as a kind of game engine, producing intricate designs, music sync challenges, and even mini-games inside Geometry Dash itself.