Pixel-perfect platformer jump (C#)

using Godot;
using System;

public partial class Character : CharacterBody2D
{
    [Export] private float JumpHeight;
    [Export] private float TimeToApex;
    [Export] private float TimeToGround;

    private Vector2 NewVelocity;
    private Vector2 OldVelocity;
    private Vector2 AppliedVelocity;
    
    public bool CanJump;
    private bool IsJumping;
    private bool IsFalling;
    
    private float ApexGravity => 2 * JumpHeight / (TimeToApex * TimeToApex);
    private float FallGravity => 2 * JumpHeight / (TimeToGround * TimeToGround);
    private float JumpForce => -2 * JumpHeight / TimeToApex;
    
    private float JumpTimer;

    void HandleJump()
    {
        void Jump() => NewVelocity.Y = JumpForce;
        
        if (Input.IsActionPressed("Jump") && !IsJumping && CanJump && IsOnFloor())
        {
            Jump();
            CanJump = false;
            IsJumping = true;
        }
        else if (IsOnFloor())
        {
            CanJump = true;
            IsJumping = false;
        }
    }
    
    public override void _PhysicsProcess(double delta)
    {
        AppliedVelocity = Velocity;
        
        Move();
        HandleJump();

        OldVelocity = NewVelocity;
        NewVelocity.Y += Gravity() * (float)delta;
        NewVelocity.Y = Mathf.Clamp(NewVelocity.Y, !IsOnCeiling() ? JumpForce : 0, !IsOnFloor() ? Mathf.Inf : 0);

        AppliedVelocity.Y = (OldVelocity.Y + NewVelocity.Y) * .5f;

        // if (IsFalling)
        // {
        //     JumpTimer += (float)delta;
        // }
        // else if (!IsFalling && JumpTimer != 0)
        // {
        //     GD.Print(JumpTimer);
        //     JumpTimer = 0;
        // }
        
        GD.Print(GlobalPosition.Y);
        
        Velocity = AppliedVelocity;
        MoveAndSlide();
    }

    void Move()
    {
        Vector2 direction = Vector2.Zero;
        direction.X = Input.GetAxis("MoveLeft", "MoveRight");
        AppliedVelocity.X = direction.X * 500;
    }

    float Gravity()
    {
        IsFalling = !IsOnFloor() && NewVelocity.Y >= 0;
        return IsFalling ? FallGravity : ApexGravity;
    }
}