I need help about Collision and Area2D

Question

hi everybody
I need help about my firts godot project. I'm making a game similar to asteroid but now I'm stuck. I have made a spaceship, enemy and missile all with kinematicbody2d but, I can do work the collision. I try to study the demos 'simple shooting' but i dont understand how work Area2D, your sintax and your connection.
I hope the someone can help me to understand or can give me links to some guide or tutorial.

p.s.
English isn't my native languege but I hope that I could explain my problem good.

Answer 1

demo is good, but you should read also this.

http://docs.godotengine.org/en/latest/tutorials/2d/physics_introduction.html

Answer 2

Also, check this one: Space Shooter Tutorial

And, this one: Space Shooter Tutorial2