We have developed a wall amusement system for exergames (video games that are also a form of exercise) in which we play and operate by range scanner measurements. A screen is projected on a wall by an ultra-short throw projector. This system can be set up anywhere if there is a certain sized wall. We present here the system using mirrors with Range scanners. This makes both the time and space resolution of measurement by range scanners improved very much. We use this new system to develop exergames with wall surface.