Long startTime;
            Long endTime = System.currentTimeMillis();
            Long passedTime;
            while(!isCancelled())
            {
                startTime = System.currentTimeMillis();

                passedTime = startTime - endTime;

                this.game.update(passedTime);
                publishProgress();
                TimeUnit.MILLISECONDS.sleep(MILLISECONDS);
                endTime = System.currentTimeMillis();
            }