The ultimate 3D online rolling ball game will undoubtedly be Roll Sky Ball 3D. Since the game is playable on whatever mobile device you choose (Android or iOS), you can also directly experience it on your PC! A format that was initially made popular in the realm of mobile games, where you would swipe or just move your phone to roll the balls forward!
How to play
Using the same control, move the mouse forward to speed up, backward to slow down, and left and right to steer. Reach each checkpoint on the course by moving through it; each new course you enter after that is trickier, but also longer and more enjoyable.