Balls3D Basic is a self entertaining, three dimensional gravity simulation. You cant stop playing it when you felt the fun of it. Best place to play it is a transit like a subway or bus. Dont even try to play it while you are walking on the street otherwise you can hurt yourself.
The game contains hundreds of 3D balls in a box just under the screen glass of your iPhone or iPad. The balls move up and down according to the real world gravity. So, you can turn or shake your device to move the balls around. You can even simulate a very low gravity by touching the screen.