I didn't have anyone available to try it with but I was curious to see what you had going, so I tried playing in two separate browsers, but I ended up with glitches where one side was extremely blurry and couldn't move. :c
I tried it! It's really awesome, and the main mechanic is super original + faithful to poker! The music was really cool (although sometimes a bit too grainy), and the sprites are really well made!
Just wanted to let you know that the bug should be fixed! I don't really have a way to be sure until someone says it's not but I hope I wasn't just lucky 😅