unity c# help

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


public class PlayerController : MonoBehaviour
{

    public Text speedtext;
    public Text countext;
    public Text bumptext;
    public float startspeed;

    private Rigidbody2D rb2d;
    private int count;
    private int bumpcount;
    private float speedmultiplier;
    private Vector2 ufovelocity;

    // Start is called before the first frame update
    void Start()
    {
        rb2d = GetComponent<Rigidbody2D>();
        count = 0;
        SetCountext();
        speedmultiplier = 1;
        Setspeedtext();
        bumpcount = 0;
        Setbumptext();
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        float movex = Input.GetAxis("Horizontal");
        float movey = Input.GetAxis("Vertical");

        Vector2 movexy = new Vector2(movex, movey);

        rb2d.AddForce(movexy * startspeed * speedmultiplier);

    }

    private void OnCollisionEnter2d(Collision2D col)
    {
        if (col.gameObject.CompareTag("Wall"))
        {
            bumpcount++;
            Setbumptext();
        }
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("PickUp"))
        {
            other.gameObject.SetActive(false);
            count++;
            SetCountext();
            speedmultiplier = speedmultiplier + 1;
            Setspeedtext();
        }
    }

    void SetCountext()
    {
        countext.text = "Count = " + count.ToString();
    }
    void Setspeedtext()
    {
        speedtext.text = "Speed multiplier = " + speedmultiplier.ToString();
    }
    void Setbumptext()
    {
        bumptext.text = "Wall bumps = " + bumpcount.ToString();
    }
}