In Fill Ball, players take on the role of a small, circular entity that bounces around a vast, open arena. The objective is to maintain control and momentum while navigating the unpredictable environment.
The main challenge lies in avoiding obstacles and interacting with the arena's geometry to extend the ball's run. The game runs entirely in a web browser, requiring no download or registration. The player must adapt to the sphere's ever-changing behavior and find ways to prolong its journey, with the ultimate goal of achieving an extended play session.