'Moving' a fixed Distance to the left/right

Questions & Answers
1

I want to create a Game, where your Character has to Dodge blocks etc. on 3 Diffrent Lanes(f.e. like Subway Surfer) I just cant figure out how to set a fixed Distance for my Character to move.
(Note that my Character will be constantly moving forward). I have setup a Level, where you spawn on a huge cube(0,0,0). How can i tell Unity to move my Character EXACTLY 30 to X?

public class burgerController : MonoBehaviour
    {
    // speed is set on 5 in the Editor.
    public float speed;
    public int counter = 0;
     
void Update()
{

 transform.Translate(Vector3.forward * speed * Time.deltaTime, Space.World);

 if (counter >= 0)
 {
     if (Input.GetKeyDown("a"))
     {
         transform.Translate(new Vector3(-30, 0, 0) * speed * Time.deltaTime, Space.World);
         counter--;
     }
 }
 if (counter <= 0)
 {
     if (Input.GetKeyDown("d"))
     {
         transform.Translate(new Vector3(30, 0 , 0) * speed * Time.deltaTime,Space.World);
         counter++;
     }
 }
 if (counter == -1)
 {
     if (Input.GetKeyDown("s"))
     {
         transform.Translate(new Vector3(30, 0, 0) * speed * Time.deltaTime, Space.World);
         counter = 0;
     }
 }
 if (counter == 1)
 {
     if (Input.GetKeyDown("s"))
     {
         transform.Translate(new Vector3(-30, 0, 0) * speed * Time.deltaTime, Space.World);
         counter = 0;
     }
 }

}

I have tried several Ways to fix this and just couldnt find a Solution, it is really Important and i would appreciate your help.
(my Character is just a sphere btw. (1/1/1 Scale) everything is setup really simple in my Level)

2

If you want to move an object a fixed distance, you need to remove the multiplication with Time.deltaTime & speed. That multiplication makes the motion dependent on the speed and time that has passed in the frame.

transform.Translate(new Vector3(-30, 0, 0), Space.World); will move the object -30 units along the world X axis. Note that this will the motion on a single frame.