Simulation/Assets/Scripts/UI/TransformToolbarScript.cs

using UnityEngine;
using Octopus.Simulator;
using UnityEngine.UI;

public class TransformToolbarScript : MonoBehaviour
{
    Button Button_Hand;
    Button Button_Move;
    Button Button_Rotate;

    private void Awake()
    {
        Button_Hand = transform.Find(nameof(Button_Hand)).GetComponent<Button>();
        Button_Move = transform.Find(nameof(Button_Move)).GetComponent<Button>();
        Button_Rotate = transform.Find(nameof(Button_Rotate)).GetComponent<Button>();

    }
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        FindAnyObjectByType<Panel_SimulationUI>().onPlaying += OnPlay;
    }

    void OnPlay(bool flag)
    {
        Button_Hand.interactable = false;
        Button_Move.interactable = false;
        Button_Rotate.interactable = false;
    }
}