private void PlaceHero()
{
int x = UnityEngine.Random.Range(0, map.GetLength(1));
int y = UnityEngine.Random.Range(0, map.GetLength(0));
var closestRoad = MazeHelper.GetClosestRoad(map, x, y);
_hero.position = new Vector3(closestRoad.Item1, 0, closestRoad.Item2);
}