In the vast universe, there are many planets are still in the dark, waiting for you to send the light. Players t use the props to lead the light to the green planet, if the light through the planet, the planet will turn yellow and restore vitality, when the light through all planets, you will pass the level. The less time spent on the game, the higher the score!
Players can operate the game int two ways, drag, or click (you can change the operating in the setting panel), by using props in the toolbar, put them to the right place, to change the light direction, if the light pass through th planet, the planet will revitalized and become yellow, when all the planets are become yellow, you get the game victory.
Triangle props: can change the light's dorection.
Semicircular props: create a new generation of the light, which perendicular to the light.
Round props: create four new generation of the light in four directions.