Can someone tell me what's wrong with my code?

Question

Hi All, I am new and just got an interview coding question. My code is below. The feedback was unsatisfied but I cannot see why. The code is fully tested.

Definitely need a second eye on it. Can someone tell me what's wrong with it? Thanks a bunch!

Here is the objective. And class Team is the missing class I wrote.

Implement the missing class without modifying the provided classes.  

The correct output should be:

 

     Local Boys = 6 (Home)

     Tourists = 0 (Away)

Code is here:

using System;

namespace Invision.Test

{

    public class Team

    {

        public enum FieldAdvantage { Home = 100, Away = 200 };

        

        // declare a delegate to wire up score change event to the class

        public delegate void ScoreChangeEventHandler(FieldAdvantage side, int newScore, ref bool overrule);

        protected string _name;

        protected FieldAdvantage _side;

        protected int _score;

        // declare the score change "event" which will be called whenever score value is changed

        // this "event" will be set in the Referee class

        public ScoreChangeEventHandler ScoreChange;

        // this method will be called from the setter

        // after execution, it sets the bool value passed from the caller

        protected void OnScoreChanged(FieldAdvantage side, int newScore, ref bool overrule)

        {

            if (ScoreChange != null)

            {

                ScoreChange(side, newScore, ref overrule);

            }

        }

        public virtual int NumPlayers

        {

            get { return 0; }

        }

        public FieldAdvantage Side

        {

            get { return _side; }

            set { _side = value; }

        }

        public int Score

        {

            get { return _score; }

            set

            {

                _score = value;

                bool overrule = false;

                OnScoreChanged(_side, _score, ref overrule);

                if (overrule)

                {

                    _score -= 100;

                    if (_score < 0)

                        _score = 0;

                }

            }

        }

        public Team(string name, FieldAdvantage side)

        {

            _name = name;

            _side = side;

        }

        // override ToString method for displaying the name field

        public override string ToString()

        {

            return _name;

        }

    }

    public class FootballTeam : Team

    {

        public FootballTeam(string name, FieldAdvantage side)

            : base(name, side)

        {

        }

        public override int NumPlayers

        {

            get

            {

                return 11;

            }

        }

        public void Touchdown()

        {

            // calls the setter method of property Score

            Score += 6;

        }

    }

    public class Game

    {

        public FootballTeam Home = new FootballTeam("Local Boys", Team.FieldAdvantage.Home);

        public FootballTeam Away = new FootballTeam("Tourists", Team.FieldAdvantage.Away);

        public static void Main()

        {

            Game game = new Game();

            Referee referee = new Referee(game);

            game.Home.Touchdown();

            game.Away.Touchdown();

            game.Home.Score += 100;

            Console.WriteLine("{0} = {1} ({2})", game.Home, game.Home.Score, game.Home.Side.ToString());

            Console.WriteLine("{0} = {1} ({2})", game.Away, game.Away.Score, game.Away.Side.ToString());

        }

    }

    public class Referee

    {

        public Referee(Game game)

        {

            game.Home.ScoreChange += new Team.ScoreChangeEventHandler(OnScoreChange);

            game.Away.ScoreChange += new Team.ScoreChangeEventHandler(OnScoreChange);

        }

        private void OnScoreChange(Team.FieldAdvantage side, int newScore, ref bool overrule)

        {

            if ((side == Team.FieldAdvantage.Away) || (newScore > 100))

                overrule = true;

        }

    }

}