You move your character by walking around in the real world and as you move, you’ll see your character move on the screen. Your movement is detected with GPS, which requires your phone to have location detection enabled.
The game shows your heading in real life with the white cone that rotates around Moomintroll. If your direction is not right in the game you can try to recalibrate your phone compass by making a figure 8 with it.
You can measure the distance of how much you need to move in real life to reach a certain location by tapping outside your interaction range. Your interaction range is shown by the blue circle that is around Moomintroll.
Please note that you should never drive or travel at high speeds when playing Moomin move. Pay attention to your surroundings and take other people into consideration.