Character Running and MovementHow to Setup Colliders and Character Movement in Unity

Source Code for Player.cs

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

public class Player : MonoBehaviour{
    [Header("Horizontal Movement")]
    public float moveSpeed = 10f;
    public Vector2 direction;
    private bool facingRight = true;

    [Header("Components")]
    public Rigidbody2D rb;
    public Animator animator;

    [Header("Physics")]
    public float maxSpeed = 7f;
    public float linearDrag = 4f;

    // Update is called once per frame
    void Update(){
        direction = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
    }
    void FixedUpdate(){
        moveCharacter(direction.x);
        modifyPhysics();
    }
    void moveCharacter(float horizontal){
        rb.AddForce(Vector2.right * horizontal * moveSpeed);

        if((horizontal > 0 && !facingRight) || (horizontal < 0 && facingRight)){
            Flip();
        }
        if(Mathf.Abs(rb.velocity.x) > maxSpeed){
            rb.velocity = new Vector2(Mathf.Sign(rb.velocity.x) * maxSpeed, rb.velocity.y);
        }
        animator.SetFloat("horizontal", Mathf.Abs(rb.velocity.x));
    }
    void modifyPhysics(){
        bool changingDirections = (direction.x > 0 && rb.velocity.x < 0) ||  (direction.x < 0 && rb.velocity.x > 0);

        if(Mathf.Abs(direction.x) < 0.4f || changingDirections){
            rb.drag = linearDrag;
        }else{
            rb.drag = 0f;
        }
    }
    void Flip(){
        facingRight = !facingRight;
        transform.rotation = Quaternion.Euler(0, facingRight ? 0 : 180, 0);
    }
}