Simple 2D swipe jump for Unity Engine

swipeJump.cs

//************** REAL GAMES STUDIO ***************
//************************************************
//realgamesss.weebly.com
//gamejolt.com/@Real_Game
//realgamesss.newgrounds.com/
//real-games.itch.io/
//youtube.com/channel/UC_Adg-mo-IPg6uLacuQCZCQ
//************************************************

using UnityEngine;

public class SwipeJump : MonoBehaviour
{
	Vector2 startTouchPosition, endTouchPosition;
	Rigidbody2D rb;

	float jumpForce = 700f;
	bool jumpAllowed = false;

	void Start()
	{
		rb = GetComponent<Rigidbody2D>();
	}

	void Update()
	{
		SwipeCheck();
	}

	void FixedUpdate()
	{
		JumpIfAllowed();
	}

	private void SwipeCheck()
	{
		if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began)
			startTouchPosition = Input.GetTouch(0).position;

		if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended)
		{
			endTouchPosition = Input.GetTouch(0).position;
			if (endTouchPosition.y > startTouchPosition.y && rb.velocity.y == 0)
				jumpAllowed = true;
		}
	}

	void JumpIfAllowed()
	{
		if (jumpAllowed)
		{
			rb.AddForce(Vector2.up * jumpForce);
			jumpAllowed = false;
		}
	}
}