To defend a Planet from space, the most suitable way would certainly be... a Defense Satellite Network !
Earths Of Alioth - Laser Action, is the first game to offer you interplanetary battles with an innovative navigation mode, perfectly suited to your mobile phone or tablet, since you simply "Jump" from a satellite to another by tapping it with your finger, through sixteen increasingly complex levels (more to come with updates)!
Explore exo-planets from the Alioth System (also known as Epsilon Ursae Majoris) in a science fiction mood, accompanied by graphics you never thought possible to see on your device!
The strategy is also there through items you will find on satellites: Lasers, Robots, Shield, Bonus, which you will use on satellites in the most sensible way to overcome the mysterious drones from space.
Note that our left-handed friends will be able to put the buttons on the left in the preferences !