Support

Press the pause button on the far left of the toolbar to stop time. This will be replaced with a play button which can be used to start time again.

The second button from the left (an arrow curved in a circle) will reset the universe to a random starting point with planets orbiting a star.

Press the + button in the middle of the toolbar.
Use the slider which appears to select the size of the planet.
Swipe on the screen to launch the planet. The speed of the planet depends on how fast you swipe.

Press the "tails mode" button to the right of the center of the toolbar. This will change between three modes: no tails, long tails and short tails.

Press the button on the far right to focus the screen on the largest planet in the universe.
Alternatively, double tap on a planet to focus the screen on it.