HealthCollectableBehavior.cs

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

public class HealthCollectableBehavior : MonoBehaviour, ICollectableBehavior
{
   [SerializeField] private float healthAmount;

   public void OnCollected(GameObject player)
   {
      // Adds health to the player
      player.GetComponent<HealthController>().AddHealth(healthAmount);
   }
}