https://core-ball.org, the player taps or clicks to launch a ball toward a rotating central object. The goal is to attach all balls to the core without colliding with previously placed balls. Each level presents a different pattern and speed, requiring precise timing. If a ball hits another, the level fails and must be restarted. The controls are very simple, but mastering the timing is challenging. As levels progress, the rotation speed and complexity increase, making it more difficult to succeed.