I create a room on a Mac, but not find the room on the other Mac. Must create on ipad?

I really like the idea of this app – allowing players to play games online much the same way they would in real life. It would be great if users could upload an image to be used as the game board when creating a table, and arbitrarily load game pieces as needed (dice, player tokens, etc.). For instance, I’d like to be able to play Twenty Squares (aka “The Royal Game of Ur”) with custom rules.