今天發現被撞擊的小球移動有些生硬，所以改了一下被撞擊之後小球的移動方式。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : MonoBehaviour
{
    //需要“擠開”的物體陣列
    public GameObject[] targets;
    //需要“擠開”的物體的邊界框
    Bounds[] targetBound;
    //自身的邊界框
    Bounds bound;

    //虛擬一個平面用來判斷目標位於自身的左邊或右邊
 

    Plane plane;
    //自身與目標物體的半徑和
    Vector2[] dis;

    //滑鼠點選的點
    Vector2 clickPoint = Vector2.zero;
    //是否移動
    bool isMove;
    //小球散開時移動速度
    public float speed;

    void Start()
    {
        //初始化
        isMove = false;
        targetBound = new Bounds[targets.Length];
        dis = new Vector2[targets.Length];

        bound= this
 
.GetComponent<Renderer>().bounds;

        for (int i = 0; i < targets.Length; i++)
        {
            targetBound[i] = targets[i].GetComponent<Renderer>().bounds;

            dis[i] = bound.extents + targetBound[i].extents;
        }

        //print("邊界盒的中心" + bound.center);
        //print("邊界框的實際範圍。這個總是size的一半。" + bound.extents);
 

        //print("邊界盒的最大點，這個總是等於center + extents。" + bound.max);
        //print("邊界盒的最小點，這個總是等於center-extents。" + bound.min);
        //print("邊界盒的總大小。這個總是extents的兩倍大。" + bound.size);

    }


    void Update()
    {
        for (int i = 0; i < targets.Length; i++)
        {
            if (Vector2.Distance(this.transform.position, targets[i].transform.position) < dis[i].x)
            {
                Vector3 vector = targets[i].transform.position - this.transform.position;
                Vector3 dir = vector.normalized;
                targets[i].transform.Translate(dir * Time.deltaTime * speed);
            }
        }

        if (Input.GetMouseButtonDown(0))
        {
            isMove = true;
            clickPoint = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        }

        CricleMove();
    }


    /// <summary>
    /// 主角移動
    /// </summary>
    void CricleMove()
    {
        if (isMove)
        {
            this.transform.position = Vector2.MoveTowards(this.transform.position, clickPoint, Time.deltaTime * 2);

            if (Vector2.Distance(this.transform.position, clickPoint) < 0.1f)
            {
                isMove = false;
            }
        }
    }
}

修改之後的撞擊效果，如圖：

到這就OK了！