code: function worldDebug() {
  		Crafty.e( RenderingMode + ', Color' )
  			.attr( {
  			x: engine.world.bounds.min.x,
  			y: engine.world.bounds.min.y,
  			w: engine.world.bounds.max.x - engine.world.bounds.min.x,
  			h: engine.world.bounds.max.y - engine.world.bounds.min.y,
  			alpha: 0.5
  		} )
  		.color( 'green' );
  	}
docs: Creates a rectangle filling the Matter world area