Modify a simple Ruby program to move a shape across the screen by changing the provided code in the Gosu cycle update$()$ method.

Use the code provided to get started.

You must enhance the code provided as follows:

$1.$ The shape also can be moved up and down

$2.$ The shape does not move out of the window area

Upload a screenshot of your program running to the workspace.

require 'gosu'

module ZOrder

BACKGROUND, MIDDLE, TOP $=*0.\mathrm{.}2$

end

WIDTH $=400$

HEIGHT $=500$

SHAPE$\_$DIM $=50$

class GameWindow $<$ Gosu::Window

def initialize

super$($WIDTH$,$ HEIGHT, false$)$

self.caption $=$ "Shape Moving"

@shape$\_$y $=$ HEIGHT $/2$

@shape$\_$x $=$ WIDTH $/2$

end

def update

if button$\_$down?$($Gosu::KbRight$)$ && @shape$\_$x $<($WIDTH $-$ SHAPE$\_$DIM$)$

@shape$\_$x $+=3$

end

if button$\_$down?$($Gosu::KbLeft$)$ && @shape$\_$x $>0$

@shape$\_$x $-=3$

end

if button$\_$down?$($Gosu::KbUp$)$ && @shape$\_$y $>0$

@shape$\_$y $-=3$

end

if button$\_$down?$($Gosu::KbDown$)$ && @shape$\_$y $<($HEIGHT $-$ SHAPE$\_$DIM$)$

@shape$\_$y $+=3$

end

end

def draw

Gosu.draw$\_$rect$($@shape$\_$x$,$ @shape$\_$y$,$ SHAPE$\_$DIM, SHAPE$\_$DIM, Gosu::Color::RED, ZOrder::TOP, mode $=$ :default$)$

end

end

window $=$ GameWindow.new

window.show