Nice job making a multiplayer game!
I could test it by myself opening two browser screens. However, I am unable to understand the rules as they are written. Particularly what the game mechanic is here. How am I supposed to decide whether to draw a discard, draw from the deck, or call it? Why are two cards hidden and why should I remember them? And in what way do I interact with the other player?
But mechanics aside, the lobby works, the game seems to work, and everything seems quite accessible. Nice submission!
P.s. I did notice there are a bunch of hidden input elements that can receive focus but are not visible on screen. Like in-development tag that is clickable.