Question How to move a simple 2d object

The simplest code in the world is not working.
The skull does not move.
Why?
Could you give me a solution?

Image:

https://ibb.co/0r58MQn

That's my simple code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class skullspeed : MonoBehaviour
6. {
7.     public int speed;
8.    
9.     void Update()
10.     {
11.         transform.Translate(Vector3.forward * speed * Time.deltaTime);
12.     }
13. }

 

I find the solution. The solution is use Vector2. Because is a 2d game and the Vector3 doesn"t work.

 

Please help. I am making a game, and using simalar code and it keeps telling me I am missing a } but I can't find it.
Heres the code:

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5.  
6. public class MovementScript : MonoBehaviour
7. {
8.     public float speed = 15;
9.    
10.     // Start is called before the first frame update
11.     void Start()
12.     {
13.        
14.     }
15.  
16.     // Update is called once per frame
17.     void Update()
18.     {
19.         if(Input.GetKey(KeyCode.D))
20.         {
21.             transform.Translate(Vector2.Right * speed * Time.FixedDeltaTime);
22.         }
23.     }
24. }
25.  
26.