Add illustration in README

README.md

@@ -2,6 +2,8 @@
 
 A not finished project with space crafts shooting at will with physics simulation.
 
+![SpacyShooter foe spaceship](Pictures/Foe.png)
+
 ## Build
 
 You need `make`, `SDL1` and [Box2D](https://github.com/erincatto/box2d) to build this project.