code: protected void initSystem() throws SlickException {
  		initGL();
  		setMusicVolume(1.0f);
  		setSoundVolume(1.0f);
  		
  		graphics = new Graphics(width, height);
  		defaultFont = graphics.getFont();
  	}
docs: Initialise the system components, OpenGL and OpenAL.
  
  @throws SlickException Indicates a failure to create a native handler