If you adore the many marble rolling games and apps available, you'll certainly enjoy Manic Marble. A freeware game, this one is done completely in 3D so it's definitely something new compared to the old school 2D marble rolling games or applications. The game was created by Richard Olson and thanks to the rendering it's become quite realistic and interactive. Some people have even reported experiencing motion sickness while playing the game. If in case you do, you might want to stop playing the game altogether. Meanwhile, for those who do have a stronger stomach, the game is available for free download under iTunes.