GoalSeRenderer.cs

using UniRx;
using UnityEngine;

namespace App.UI
{
    public class GoalSeRenderer : MonoBehaviour
    {
        public AudioSource AudioSource;

        void Start()
        {
            Unidux.Subject
                .TakeUntilDestroy(this)
                .Where(state => state.Game.IsStateChanged())
                .Where(state => state.Game.Phase == GameEvent.OnGoal)
                .Subscribe(_ => PlaySE());
        }

        void PlaySE()
        {
            this.AudioSource.PlayOneShot(this.AudioSource.clip);
        }
    }
}