GameDevTVObstacleDodge/Assets/Scripts/ObjectHit.cs

using UnityEngine;

public class ObjectHit : MonoBehaviour
{
    [SerializeField] int damageAmount = 10;
    private void OnCollisionEnter(Collision other)
    {
        if (other.gameObject.tag == "Player" && gameObject.tag != "Hit")
        {
            GetComponent<MeshRenderer>().material.color = Color.black;
            gameObject.tag = "Hit";
            other.gameObject.GetComponent<PlayerStats>().TakeDamage(damageAmount);
        }
    }
}