/// <summary>
/// Swap the position of two tiles at x0, y0 and x1, y1 indices
/// </summary>
private static void SwapPos(int x0, int y0, int x1, int y1)
{
Tile holdTile = _tiles[y0, x0];
Vector2 start = new Vector2(x0 + 1, y0 + 1);
Vector2 end = new Vector2(x1 + 1, y1 + 1);
Animate.Add(new AnimatePosition(holdTile, start, end, Duration.Short));
_tiles[y0, x0] = _tiles[y1, x1];
_tiles[y1, x1] = holdTile;
}