added rock-paper-scissors project

Author: sumn2u

en/beginner-projects/rock-paper-scissors-game.md

@@ -20,3 +20,12 @@ Build a classic Rock Paper Scissors game where you play against the computer. Ch
 ## Bonus Challenge
 Add animations and sound effects to make the game more interactive.
 
+## Live Demo
+<div align="center">
+  <iframe src="https://codesandbox.io/embed/7kjyv3?view=preview"
+     style="width:100%; height: 500px; border:0; border-radius: 4px; overflow:hidden;"
+     title="rock-paper-scissors"
+     allow="accelerometer; ambient-light-sensor; camera; encrypted-media; geolocation; gyroscope; hid; microphone; midi; payment; usb; vr; xr-spatial-tracking"
+     sandbox="allow-forms allow-modals allow-popups allow-presentation allow-same-origin allow-scripts"
+   ></iframe>
+</div>