Circles is an experimental puzzle game for PC and Mac that utilizes only circles for its visuals and gameplay. It was developed by Jeroen Wimmers, who previously worked on 2015's Westerado: Double Barreled with Ostrich Banditos and Adult Swim Games. The game is controlled entirely by mouse movement through more than 90 levels that require both timing and strategy to complete. Circles features more than eight circle-based puzzle mechanics and four additional game modes to the main campaign for added challenge. The game is backed by a soft jazz soundtrack that is punctuated by dynamic percussion that reacts to the player's actions.