You have a limited amount of time to connect the entire track together without any dead ends. Every time you press the FIRE button, the section of track you are on rotates. Rotate the dead ends so that they connect, always avoiding the killer ball and never going off the track.
Not a bad idea, but you move so slowly and have so little control over your movement that it's simply maddening. There's nothing fun about chugging along at a snail's pace while your timer counts down.
It's PARTICULARLY not fun when it crashes, which is frequently.