Bipole spins you right round baby, right round
Bipole is a mind-bending TimeWaster that requires you to use gravity to your advantage. In the game you control the board, which is a large circle by rotating it using the arrow keys. The goal in the game is to make all of the red and blue balls touch each other (red to blue and vice-versa) to clear them from the board. Once all the balls are cleared, you have beaten the level.
As the levels progress there are devices and objects that your balls will begin to interact with, such as magnets, polarity switchers that will switch an opposite-colored ball to its color, and hazards like electrified walls. Luckily, you get one more trick up your sleeve: the ability to freeze the balls while you rotate the board. While sometimes this is a very straightforward trick around a given hazard, at other times freezing the balls just complicates matters further.
The balls carry a bit of a magnetic charge as well. So although this tends to make opposite-colored balls attracted to one another, each level is creatively designed to make getting the balls together increasingly difficult.
[Originally written for Download Squad, until I discovered that it had already been covered there.]