Use arrow keys or swipe up/down to move forward/backward. Swipe left/right to rotate.
You won't be able to see the entire labyrinth at once. The view is limited to the single tile you are currently on and any surrounding walls.
Your character is a triangle. The point of the triangle indicates the direction you are facing. If you try to move "forward" and the point of the triangle is facing a wall, your character will hit the wall, and you will feel a vibration to signal the obstacle.

Long press to turn the screen back on.