Open the PictureAction.cs script and modify it to use mouse events so that it reads as follows:

File: PictureAction.cs
using UnityEngine; 
 
public class PictureAction : MonoBehaviour { 
    public PictureCommand command; 
 
    protected PictureController picture; 
    protected Animator animator; 
 
    void Start() { 
        picture = GetComponentInParent<PictureController>(); 
        animator = GetComponent<Animator>(); 
    } 
 
    void OnMouseDown() { 
        if (animator != null) { 
            animator.SetTrigger("Click"); 
        } 
        GameController.instance.PlayClickFeedback(); 
        Invoke("DoExecute", 1); 
    } 
 
    void DoExecute() { 
        picture.Execute(command); 
    } 
}