self << @quit_button = GuiButton.new.set(:scale_x => 0.05, :scale_y => 0.06, :offset_x => -0.475, :offset_y => -0.47, :background_image => $engine.load_image('images/buttons/main-menu-quit.png'), :background_image_hover => $engine.load_image('images/buttons/main-menu-quit-hover.png'), :background_image_click => $engine.load_image('images/buttons/main-menu-quit-click.png'))