How do I get my player to move up and down

using UnityEngine;

using System.Collections;

public class PlayerMovement : MonoBehaviour {

	public float Speed = 3f;
	public float MaxJumpTime = 2f;
	public float JumpForce;
	private float move = 0f;
	private float JumpTime = 0f;
	private bool CanJump;
	
	
	void Start () {
		JumpTime  = MaxJumpTime;
	}
	
	
	void Update ()
	{
		if (!CanJump)
			JumpTime  -= Time.deltaTime;
		if (JumpTime <= 0)
		{
			CanJump = true;
			JumpTime  = MaxJumpTime;
		}
	}
	
	void FixedUpdate () {
		move = Input.GetAxis ("Horizontal");
		GetComponent<Rigidbody2D>().velocity = new Vector2 (move * Speed, GetComponent<Rigidbody2D>().velocity.y);
		if (Input.GetKey (KeyCode.W)  && CanJump)
		{
			GetComponent<Rigidbody2D>().AddForce (new Vector2 (GetComponent<Rigidbody2D>().velocity.x,JumpForce));
			CanJump = false;
			JumpTime  = MaxJumpTime;
		}
	}
}

At first my player just keep falling once I added a rigid-body 2D, so I click on “is Kinematic”. My game was working (going left and right as I used the arrows) but when I tried to go up and down my player just doesn’t go up or down, so … could you please help me. Thank you!!! (p.s. I’m a beginner)

Kinematic objects aren’t affected by forces and have to be moved via changing the transform.postition e.g transform.translate. However what I would recommend is that you turn off kinematic and turnoff gravity for your rigid-body , so they won’t fall.