RobTop, a Swedish developer of video games, is the author of the Geometry Dash series of music platform games. First launched on August 13, 2013, for iOS and Android, the game's first installment, simply named "Geometry Dash," was followed by a Steam version on December 22, 2014. In Geometry Dash, players take control of an icon (which can be an airship, ball, cube, UFO, arrow, robot, spider, or swingcopter, among other shapes) and must make their way through musically-driven levels to the finish line. The goal is to control the icon and direct it away from hazards including cogs, spikes, and crumbling walls, which will cause instantaneous damage upon impact.