Spheric is played on a circular board. The goal in this game is to create matches on circles by lining up four or more spheres of the same color. In order to control the movement of spheres tilt your device to desired direction.
Spheric - In-game Spheric - Game information

When you tilt your device the spheres move to the balanced position. If you make four or more of same color contact the matching spheres pop and score.

Spheric for iPhone