Readme update

README.md

@@ -1,7 +1,12 @@
 # Space Invaders
 
+<p align="center">
+  <img src="https://github.com/AlexOberhofer/Space-Invaders/raw/master/doc/attract.PNG" alt="Chip 8 Image"/>
+</p>
+
 An Emulation of the Intel 8080 version of Space Invaders, implemented in C using SDL2. This emulator is still under development.
 
+
 ## Building
 A makefile is provided for gnu/linux systems. This requires the SDL2 library, clang, and make to build.
 
@@ -24,12 +29,18 @@ $ make
 
 ## Running
 
-This emulator requires a singular rom file "invaders.rom" to be located in the res directory. A single rom file can be created from the individual space invaders roms by following the shell command below.
+This emulator requires a singular rom file "invaders.rom" to be located in the /res/ directory. A single rom file can be created from the individual space invaders roms by following the shell command below.
 
 ```
 $ cat invaders.h invaders.g invaders.f invaders.e > invaders.rom
 ```
 
+The program can be run with the following command when compiled from the root project directory.
+
+```
+$ ./bin/invaders
+```
+
 This project is currently a work in progress. 
 
 ## Controls
@@ -56,6 +67,10 @@ C - INSERT COIN
 X - START GAME
 ```
 
+```
+Z - COLOR MODE TOGGLE
+```
+
 Gameplay Controls
 
 ```