Tap anywhere on the screen to move the head "TitanX" to outer space carefully through the opening in each circle. Every circle has different opening, size, and speed... until you reach a black hole from which it will take you to another level with an even more exciting circles, and obstacles.
Be careful not to hit any of the circles edges, otherwise you will have to start over.
There are three different levels available now. The first two have 51 different circles, and the third level is an infinity level where you can challenge your friends to see who can go farther in space.