chunky platformer level new metric

    [Metric("Gold to Enemies Ratio")]
    public static float GoldToEnemies(object map)
    {
        ChunkyLevel sl = (ChunkyLevel)map;
        int gold = 0;
        int enemies = 0;
        for (int i = 0; i < sl.tiles.GetLength(0); i++)
        {
            for (int j = 0; j < sl.tiles.GetLength(1); i++)
            {
                if(sl.tiles[i,j] == -3)
                {
                    gold++;
                }
                if(sl.tiles[i,j] == -4)
                {
                    enemies++;
                }
            }
        }
        return (float)(enemies / gold);
    }