How to replace keyboard inputs with touch inputs.

Hey guys, I am more of a designer not a programmer so i tried out this video tutorial on how to make a 2D fighting game. According to the inputs manager the events on the x, y axis are controlled with specific keys. But i want this game to be playable on android devices so i need UI buttons i suppose ? How can i kind of make a function that uses the already working code for PlayerControl and call them on button tap ? Or maybe there is another solution ? I need 5 buttons: left, right, jump, left punch, right punch. My number one target is to follow the line of this code because have few to zero skills in C#. I am using Unity 5.3.4f1, btw i think there might be some problems with UI buttons, not very sure.This is the code i currently use. Any help is very appreciated ! Thanks

using UnityEngine; using System.Collections;

public class PlayerControl : MonoBehaviour {

 public int PlayerNumber = 1;
 Transform enemy;

 Rigidbody2D rig2d;
 Animator anim;

 float horizontal;
 float vertical;
 public float maxSpeed = 25;
 Vector3 movement;
 bool crouch;

 public float Jumpforce = 20;
 public float jumpDuration = .1f;
 float jmpDuration;
 float jmpForce;
 bool jumpKey;
 bool falling;
 bool onGround;
   

 void Start()
 {
     rig2d = GetComponent<Rigidbody2D>();
     anim = GetComponentInChildren<Animator>();

 }

 void FixedUpdate()
 {
     //#if !UNITY_ANDROID && !UNITY_IPHONE && !UNITYWINRT
     horizontal = Input.GetAxis("Horizontal" + PlayerNumber.ToString());
     vertical = Input.GetAxis("Vertical" + PlayerNumber.ToString());
     //#endif

    Vector3 movement = new Vector3(horizontal, 0, 0);
     crouch = (vertical < -0.1f);
     if (vertical > 0.1f)
     {
         if (!jumpKey)
         {
             jmpDuration += Time.deltaTime;
             jmpForce += Time.deltaTime;

             if (jmpDuration < jumpDuration)
             {
                 rig2d.velocity = new Vector2(rig2d.velocity.x, jmpForce);

             }
             else
             {
                 jumpKey = true;
             }
         }
     }

     if (!onGround && vertical < 0.1f)
     {
         falling = true;
     }
     if (!crouch)
         rig2d.AddForce(movement * maxSpeed);
     else
         rig2d.velocity = Vector3.zero;
 }

  void OnGroundCheck()
 {
     if (!onGround)
     {
         rig2d.gravityScale = 5;
     }

     else

     {
         rig2d.gravityScale = 1;
     }
 }


 void Update()
 {
     UpdateAnimator();
     OnGroundCheck();
 }

 void UpdateAnimator()
 {
     anim.SetBool("OnGround", this.onGround);
     anim.SetBool("Falling", this.falling);
     anim.SetBool("Crouch", crouch);
     anim.SetFloat("Movement", Mathf.Abs(horizontal));
 }
 void OnCollisionEnter2D(Collision2D col)
 {
     if (col.collider.tag == "Ground")
     {
         onGround = true;

         jumpKey = false;
         jmpDuration = 0;
         jmpForce = Jumpforce;
         falling = false;
     }
 }
 void OnCollisionExit2D(Collision2D col)
 {
     if (col.collider.tag == "Ground")
         onGround = false;
 }

}