Using the Kanban game for time-boxed simulation

A few weeks back I read an interesting LinikedIn posting on how to do time-boxing using Russell's Kanban game. It is an interestig way to lean Scrum using a Kanban board.

I have yet to try to do that buy my hunch is that playing the game doing time-boxing will bring afloat some of the limitations of Scrum such as task management, the lack of classes of service and policies associated to them, the lack of a way to handle urgent tasks, and the fact that not all tasks are necessarily done within the time allocated.