[Part 1] Jumping at only 1 set height still

[TheRealKnightFromHollowKnight]

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using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using UnityEngine;

public class PlayerController : MonoBehaviour
{

    [Header("Horizontal Movement Settings")]
    private Rigidbody2D rb;
    [SerializeField] private float walkSpeed = 1;
    private float xAxis;
    [Header("Ground Check Settings")]
    [SerializeField] private float jumpForce = 8.5f;
    [SerializeField] private Transform groundCheckPoint;
    [SerializeField] private float groundCheckY = 0.2f;
    [SerializeField] private float groundCheckX = 0.5f;
    [SerializeField] private LayerMask whatIsGround;



    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
    }

    // Update is called once per frame
    void Update()
    {
        GetInputs();
        Move();
        Jump();
    }

    void GetInputs()
    {
        xAxis = Input.GetAxisRaw("Horizontal");
    }

    private void Move()
    {
        rb.velocity = new UnityEngine.Vector2(walkSpeed * xAxis, rb.velocity.y);
    }

    public bool Grounded()
    {
        if(Physics2D.Raycast(groundCheckPoint.position, UnityEngine.Vector2.down, groundCheckY, whatIsGround) || Physics2D.Raycast(groundCheckPoint.position + new UnityEngine.Vector3(groundCheckX, 0, 0), UnityEngine.Vector2.down, groundCheckY, whatIsGround)
        || Physics2D.Raycast(groundCheckPoint.position + new UnityEngine.Vector3(groundCheckX, 0, 0), UnityEngine.Vector2.down, groundCheckY, whatIsGround)
        || Physics2D.Raycast(groundCheckPoint.position + new UnityEngine.Vector3(-groundCheckX, 0, 0), UnityEngine.Vector2.down, groundCheckY, whatIsGround))
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    void Jump()
    {
        if(Input.GetButtonDown("Jump") && rb.velocity.y > 0)
        {
            rb.velocity = new UnityEngine.Vector2(rb.velocity.x, 0);
        }

        if (Input.GetButtonDown("Jump") && Grounded())
        {
            rb.velocity = new UnityEngine.Vector3(rb.velocity.x, jumpForce);
        }
    }
}

[Terence]

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Your problem is here:

void Jump()
{
    if(Input.GetButtonDownUp("Jump") && rb.velocity.y > 0)
    {
        rb.velocity = new Vector2(rb.velocity.x, 0);
    }

    if (Input.GetButtonDown("Jump") && Grounded())
    {
        rb.velocity = new Vector3(rb.velocity.x, jumpForce);
    }
}

For variable jump height, you want to cut the upward velocity when the player releases the Jump button, not when they initially press it.

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