The game play is quite simple is almost like a click adventure game, there are no controls other than the ESC key in the keyboard which only pauses the game. 

Hostiles are presented as the red circles you need to destroy them before they will reach the airbase you are stationed in.

The Radar Button 

This button will allow you to scan the area for hostile aircraft or missiles. When the radar passes it will reveal the locations of the hostile.

The Re-Arming Button

Will allow you to re-arm the launcher of your defender it will provide with 10 new projectiles once its clicked.