Geometry Dash is a series of five video games created by Sweden-based developer Robert Topala and released in August 2013 for mobile devices by his company, RobTop Games. The game immediately became popular as an addicting, fast-paced platformer based on dodging obstacles while listening to a background soundtrack. Its rhythm-based platform gameplay has inspired many fans and content developers. Geometry Dash, the main game, is a rhythm-based platformer game with 21 official levels and over 40 million online levels created by players. All official levels, in particular, have been made available.