Sometimes I play with the sound volume very low or none. When I am hosting a game and waiting for a player to join my game, I want to be able to do other things instead of waiting staring at the screen. There should be some way of notifying me that a player is wishing to join my game without sound. If I have swapped to another app, it would be great if some kind of visual notice would pop up on the screen to let me know that someone is wishing to play. The sound option is not enough.