Game:      Invaders40000
Author(s): ReJ

You have a planet system to devend from invaders. You fire from the center of the
system. Everything is affected by gravity. Your task is to preserve at least 40% of
the initial planet system mass, then you're taken to the next level (where are more
invaders and they are more "smart"). 

You fire with Space, control fire strength and time-to-explode with Z/X, and control camera
with Q/A/arrows.
