I have just updated the game with a bug fix, the list of multiplayers was deleted during the game, but the buttons remained active by clicking in the upper part of the field. this opened a player selection window. Make sure your version is up to date (at the bottom of the game) ‘version 0.1.54.83’
Do not hesitate to leave me a message via my facebook page ‘petanque52’ if you see a bugs. A good description will facilitate fix.