Godot Simple 2d Movement

player.gd

extends KinematicBody2D

var speed = Vector2(500, 2500)
var gravity = 8000
var friction = 0.1
var acceleration = 0.2
var velocity = Vector2.ZERO


func _physics_process(delta: float) -> void:
	var dir = get_direction()
	var is_jump_interupted = Input.is_action_just_released("jump") and velocity.y < 0.0
	velocity = calculate_velocity(velocity, dir, is_jump_interupted, speed, delta)
	velocity = move_and_slide(velocity, Vector2.UP)


func get_direction():
	return Vector2(
		Input.get_action_strength("right") - Input.get_action_strength("left"),
		-1.0 if Input.is_action_just_pressed("jump") and is_on_floor() else 0.0
	)

func calculate_velocity(curVelocity, dir, is_jump_interupted, speed, delta):
	var out = Vector2.ZERO

	if dir.x != 0:
		out.x = lerp(curVelocity.x, dir.x * speed.x, acceleration)
	else:
		out.x = lerp(curVelocity.x, 0, friction)

	if(dir.y == -1.0): # Jumping
		out.y = dir.y * speed.y
	else: # Falling
		out.y = curVelocity.y + (gravity * delta)

	if(is_jump_interupted): # jump key release
		out.y = 0.0 + (gravity * delta)

	return out

thx my guy