I need help setting up touch controls.

I need help making touch controls for my 2D sidescroller.

I have tried several youtube and text tutorials, but they don't show you everything you need. They are also in javascript. I use C#.

Attached I have arrow textures that I want for movement, but I don't know how to get them to appear on screen and to follow the character/scene when moving. The attacking can be activated by clicking anywhere on the tablet or phone.

 using UnityEngine;
 using System.Collections;
 using SpriteFactory;
  
 public class player : MonoBehaviour {
     
     public int maxXPosition = 50;
     private Vector3 initialPos;
     private Quaternion initialRotation;
     
   
 
      public int points = 0;
     public float speed = 9.0f;
     public float jumpSpeed = 300.0f;
     public float gravity = 10.0f;
     public bool grounded = true;
     float height;
     int layerMask;
     public int numberOfPointsToWin = 30;
     public int die = -1;
     
     public bool charPressed = false;
     
  
  
     private Transform thisTransform;
     private Sprite sprite;
     private bool flipped;
     
     
     IEnumerator Death() {
    yield return new WaitForSeconds(0.1f);
         PointCounter.lives -= 1;
     transform.rotation = initialRotation;
     transform.position = initialPos;
         
         
         
     }
     
     
  
     // Use this for initialization
     void Awake () {
        thisTransform = transform;
        sprite = (Sprite)GetComponent(typeof(Sprite));
         height = collider.bounds.extents.y;
    layerMask = LayerMask.NameToLayer("Player");
  
     }
     
      void Start () {
         initialPos = transform.position;
         initialRotation = transform.rotation;
         
         
     }
  
     // Update is called once per frame
     void Update () {
         
     
         
        Vector3 moveVector = new Vector3(0,0,0);
        bool moving = false;
         
         moveVector.y -= gravity * Time.deltaTime;
         
     
         
          if(!Physics.Raycast(thisTransform.position, Vector3.down, height,layerMask)){
       sprite.Play("jump");
    }
         
         if(Input.GetKeyDown(KeyCode.Space)){
              Jump();
 }
     
 if(Input.GetKey(KeyCode.A)){
          moveVector.x -= 1.0f;
          moving = true;
 }
  if(Input.GetKey(KeyCode.D)){
          moveVector.x += 1.0f;
          moving = true;
  }
  if(Input.GetKey(KeyCode.F)){
          Attack();
        } else {
          if(!IsAttacking()) {
           if(moving) {
               Move(moveVector);
           } else {
               Stand();
          }
        }
        
 
     }
         
         
         
        }
     
 
 
  private void Stand() {
        sprite.Stop();
     }
     
 
     
   private void Move(Vector3 moveVector) {
        FlipSprite(moveVector.x);
        moveVector *= speed * Time.deltaTime;
        thisTransform.position = thisTransform.position + moveVector;
        sprite.Play("walk");
  
  
  
  
     }
  
     private void FlipSprite(float x) {
        if(x == 0.0f) return;
  
        float xDir = Mathf.Sign(x);
        if(!flipped && xDir < 0.0f) {
          flipped = true;
          sprite.SetFlippedState(true, false);
        } else if(flipped&& xDir > 0.0f) {
          flipped = false;
              sprite.SetFlippedState(false, false);
        }
     }
  
     private void Attack() {
        if(IsAttacking()) return;
  
        sprite.Play("Sword");
     }
  
     private bool IsAttacking() {
        if(sprite.IsAnimationPlaying("Sword")){ return false;}
        return false;
 }
     
         void Jump(){
         if(grounded == true)
         {
         rigidbody.AddForce(Vector3.up * jumpSpeed);
             grounded = false;
     }
         
     }
     
     void Gravity(){
         if(grounded == true)
         {
         rigidbody.AddForce(Vector3.up * jumpSpeed);
             grounded = false;
     }
         
     }
     
     void OnCollisionStay(Collision col){
         if(col.gameObject.tag == "floor"){
             grounded = true;
         
     }
     }
     
     void OnTriggerEnter(Collider other) {
         if(other.gameObject.name == "Enemy"){
              
             sprite.Play("hurtt");
                 if(sprite.IsAnimationPlaying ("hurtt")){
                 
                 StartCoroutine(Death());
             
         
     
 
         
     }
   }
 
     }
     
     void OnTriggerExit(Collider other) {
         
     }
     
 
 }