rabidus-test/Assets/Scripts/EnergyItem.cs

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

public class EnergyItem : MonoBehaviour, IInteractable
{
    [SerializeField]
    private float _energy = 1;

    private EnergyController _energyController;

    private void Awake()
    {
        _energyController = FindObjectOfType<EnergyController>();
    }

    public void Interact()
    {
        _energyController.Energy += _energy;
        Destroy(gameObject);
    }
}