Barrack-Unity/Assets/Scripts/Game/Balls/BasicBall.cs

using UnityEngine;

public class BasicBall : BallBase
{
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        audioSource = GetComponent<AudioSource>();
        animator = GetComponent<Animator>();
        speed = new Vector2(Random.Range(-0.05f, 0.05f), Random.Range(-0.05f, 0.05f));

        audioSource.PlayOneShot(spawnSound);
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        AnimatorStateInfo stateInfo = animator.GetCurrentAnimatorStateInfo(0);

        if (stateInfo.IsName("BasicBallMove")) {
            transform.Translate(speed);
        }
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.CompareTag("Wall") || 
            collision.gameObject.CompareTag("BasicBall") || 
            collision.gameObject.CompareTag("FruitBall"))
        {
            ContactPoint2D contact = collision.GetContact(0);
            speed = Vector2.Reflect(speed, contact.normal);
        }
    }
}