Left-click the fixed ball with the mouse.

After entering the game, you need to click on the balls on the screen to enter the main page. By doing so, you will already know how to operate. In the first level, you will find a semi-solid ball connected to a solid black ball. By clicking on the semi-solid ball, you can remove its fixed device and make it drop, allowing you to proceed to the next level. At this point, you will notice the appearance of hollow white balls. You simply need to let the black ball pass through them to turn them black. Then, let the entire chain of balls drop down to successfully complete the level. However, if you fail to turn all the hollow balls black when removing the last fixed device, it means you have failed the level and need to restart.As the difficulty of the levels gradually increases, the puzzles become more and more complex. You need to consider the various possible movements of the balls. Sometimes, your puzzle-solving method may turn most of the hollow balls black but still leave one that cannot be colored. In such cases, you need to reconsider your previous approach and try different solutions. This game is very entertaining, not only as a time killer but also as a way to exercise your spatial imagination. Challenge yourself and conquer more levels!