I want to click/touch and move my object(2D) on Y axis at certain speed, and I want it so if the user clicks again the speed will not change until it touches a certain object(Line).

Questions & Answers
1

I want to click/touch and move my object(2D) on Y axis at certain speed, and I want it so if the user clicks again the speed will not change until it touches a certain object(Line).

2

Basically figured it out!

using UnityEngine;
using System.Collections;

public class GameBallMove : MonoBehaviour {

public float BallMoveForce = 10f;
private Rigidbody2D rb;
private bool ballInPlay;
// Use this for initialization
void Awake () {
    rb = GetComponent<Rigidbody2D>();
}

// Update is called once per frame
void Update () {
    if (Input.GetMouseButtonUp(0) && ballInPlay == false)
    {
        ballInPlay = true;
        rb.AddForce(new Vector2(0, BallMoveForce));
    }
}

}