Dedigin gibi sabit bir noktaya gore tum kutularin y koordinatlarini guncelleyince oldu :)

SlotScreen.as

    private function onEnterFrame(event:EnterFrameEvent):void {
        const distance : Number = event.passedTime * velocity;
        const reelHeight : Number = boxSize * boxes.length;

        //0 ile reel height arasinda gidip geliyor...
        totalDistance = (totalDistance + distance ) % reelHeight;

        for (var i:int = 0; i<boxes.length; i++) {
            boxes[i].y = (boxStartY + totalDistance + (i * boxSize) ) % reelHeight;
        }
    }