Make more descriptive controls
The problem with using a graphic such as the red X, double bars, left arrow, and even the words "sit" and "stand Up" is that they are NOT intuitive to everyone. I have played about 6 games and I have asked about how to be sure it is my turn, and am still trying to guess or remember what happens with the others. I would suggest less ambiguous controls. Call me picky, but it would be a better UI for me.
The “pause” and “stop” graphics have been removed and replaced with links to the main page and to the game’s specific lobby.
One possibility is to replace "Sit" with either "Join" or "Play" and get rid of the "Stand" option completely once the game has started.
The "Stand" option between games could be renamed to "Leave" or "Quit" or "Exit"
I'm not immediately sure what to do about "Sit" and "Stand". I can see how they're confusing, especially in the context of a turn based game.