This is a pong-like game created in HTML, CSS and JavaScript. A tutorial has been followed, which has been mentioned below. The game does not support multiplayer across multiple devices. Both players are controlled from the same system/keyboard.
The controls are quite simple and representative.
Left-side rectangle
W Move upward
S Move down
Right-side rectangle
Arrow Up Move upward
Arrow Down Move Down
The tutorial https://www.youtube.com/watch?v=LTtfoyHxAVU