How to move an rigidbody left and right as it is moving up

Questions & Answers
1

I have a game object with a rigidbody. It is like a space which is continuously moving up and then when the player presses the left arrow, I want the object to shift left to avoid obstacles.
I have been trying to use rigidbody.moveposition to do that but when ever i press the left button, the spaceship moves to left and stop moving up and then also disappear from the screen. How can I fix this so that when the user presses left, the spaceship moves smoothly to the left as it keeps moving up. This is the code that I used:

 public class PlayerController : MonoBehaviour {
            	Rigidbody2D rb;
            	public float gameSpeed;
            	bool moveLeft;
            

        	// Use this for initialization
        	void Start ()
        	{
        		rb = GetComponent <Rigidbody2D> ();
        	}
        	
        	// Update is called once per frame
        	void Update ()
        	{
        		 if (Input.GetKeyUp (KeyCode.LeftArrow)) 
        		{
        			moveLeft = true;
        		}
        	}
        
        	void FixedUpdate ()
        	{
        		MovePlayer ();
        	}
        
        	void MovePlayer ()
	{
		rb.velocity = (new Vector2 (0, 1f)) * gameSpeed; //Move player continuosly up
                //Move Player to left and right as player keeps moving up.
		if (moveLeft) 
		{
			rb.MovePosition (new Vector2 ((transform.position.x - 1.4f), transform.position.y));
		}
	}
2

Try and use (not sure if this will work)

transform.position += new Vector3(0, 0, 0);

change the 0s to what you want first one is x then y then z. I think

eg first 0 to 5

3

Here is how to do it.