Target moving and i can't catch it correctly

Questions & Answers
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1

I am developing a game where the main character constantly moves at a certain speed and collects coins.


When the coins are collected, an animation(DOTween) moves them to a text that displays the total number of fixed coins on the screen

Vector3 targetPosition = Transform target.position

However, since the character and the background are constantly moving forward, the coins end up going behind the target position. How can i solve this problem ?


Although I tried solutions like FixedUpdate-Update, it didn’t work.
Can you help me with this?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using DG.Tweening;
using System.Collections.Generic;

public class CoinCounter : MonoBehaviour
{
    [Header("UI reference")]
    [SerializeField] TMP_Text coinUIText;
    [SerializeField] GameObject animatedCoinPrefab;
    [SerializeField] Transform target;

    [Space]
    [Header("Available coins : (coins to pool )")]
    [SerializeField] int maxCoins;
    Queue<GameObject> coinsQueue = new Queue<GameObject>();

    [Space]
    [Header("Animation settings ")]
    [SerializeField] [Range(0.5f,0.9f)] float minAnimDuration;
    [SerializeField] [Range(0.9f,2f)] float maxAnimDuration;

    [SerializeField] Ease easeType;

    Vector3 targetPosition;

    private int _c = 0;

    public int Coins
    {
        get{return _c;}
        set{
            _c = value;
            //update UI text whenever "Coins" variable is changeds
            coinUIText.text = Coins.ToString();
        }
    }

    void FixedUpdate()
    {
        targetPosition = target.position;
        //prepare pool
        PrepareCoins();
    }

    void PrepareCoins()
    {
        GameObject coin;
        for(int i = 0; i<maxCoins; i++)
        {
            coin = Instantiate(animatedCoinPrefab);
            coin.transform.parent = transform;
            coin.SetActive(false);
            coinsQueue.Enqueue(coin);
        }
        
    }

    void Animate(Vector3 collectedCoinPosition, int amount)
    {
        for(int i = 0; i<amount; i++)
        {
            
            //check if there's coins in the pool
            if(coinsQueue.Count > 0)
            {
                //extract a coin from the pool
                GameObject coin = coinsQueue.Dequeue();
                coin.SetActive(true);

                //move coin to the collected coin pos
                coin.transform.position = collectedCoinPosition;

                //animate coin to target position
                float duration = Random.Range(minAnimDuration,maxAnimDuration);
                Vector3 initialPosition = collectedCoinPosition;
                Vector3 targetOffset = targetPosition - initialPosition;
                coin.transform.DOMove(targetPosition + targetOffset,duration).SetEase(easeType).OnComplete(()=>
                {
                    //execute whenever coin reach target position
                    coin.SetActive(false);
                    coinsQueue.Enqueue(coin);

                    Coins++;
                });

            }
        }
    }
    public void AddCoins(Vector3 collectedCoinPosition, int amount)
    {
        Animate(collectedCoinPosition,amount);
    }

    // Update is called once per frame
    void OnTriggerEnter2D(Collider2D other)
    {
       
    }
}