Earth in Danger

“Hey,Wake up!You are the only survivor!The Earth need you!” When you open your eyes,you find a bizarre-looking bird stare at you and you are in space!!! The bird tells you the only weapons you have are the Moon and Gravity!!!But when you are strong enough,you can use many other skills,even a Black Hole or Worm Hole!!! How crazy is that! The letters you will receive may help you figure out what’s going on,and also reveal the truth of the world to you! ----The gameplay is completely new!Not similar with any other games!You’ll get a whole new gaming experience! ----The sci-fi plots will refresh your knowledge of the world and universe! What are you waiting for?Let’s start the amazing adventure now! Key words:physics game,rolling,ball,galaxy,universe,gravity,science fiction,letter,Moon,Alien