Персонаж проходит сквозь стены

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
 
public class BOX : Unit
 
{
 
    [SerializeField]
    private int lives = 3;
 
    [SerializeField]
   public float speed = 3.0F;
   
    private bool isGrounded = false;
 
    private Vector2 direction;
 
    new private Rigidbody2D rigidbody;
    private SpriteRenderer sprite;
 
    private void Awake()
    {
        rigidbody = GetComponent<Rigidbody2D>();
        sprite = GetComponentInChildren<SpriteRenderer>();
 
    }
 
    private void Start()
    {
        direction = Vector2.up;
    }
 
    private void FixedUpdate()
    {
        CheckGround();
    }
 
    private void Update()
    {
        GetInput();
        Run();
    }
 
    
 
    private void Run()
    {
        transform.Translate(direction*speed*Time.deltaTime);
 
    }
 
    private void GetInput()
    {
        direction = Vector2.zero;
 
        if (Input.GetKey(KeyCode.W))
        {
            direction += Vector2.up;
        }
        if (Input.GetKey(KeyCode.A))
        {
            direction += Vector2.left;
        }
        if (Input.GetKey(KeyCode.S))
        {
            direction += Vector2.down;
        }
        if (Input.GetKey(KeyCode.D))
        {
            direction += Vector2.right;
        }
 
    }
   
 
   
    public override void ReceiveDamage()
    {
        lives--;
        rigidbody.velocity = Vector3.zero;
        rigidbody.AddForce(transform.up * 8.0F, ForceMode2D.Impulse);
        if (lives < 1) SceneManager.LoadScene("Death");
        Debug.Log(lives);
    }
 
    private void CheckGround()
    {
 
        Collider2D[] colliders = Physics2D.OverlapCircleAll(transform.position, 0.3F);
    }
 
    private void OnCollisionEnter2D(Collision2D collider)
    {
        if (collider.gameObject.name == "Portal")
 
            SceneManager.LoadScene("Ekran");
    }
 
    private void OnTriggerEnter2D(Collider2D collider)
    {
        
            Unit unit = collider.gameObject.GetComponent<Unit>();
        if (unit)
        {
            Debug.Log("OK");
            ReceiveDamage();
        }
 
    }
   
 
}