How to do ladder climb 2D Platformer

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:information_source: Attention Topic was automatically imported from the old Question2Answer platform.
:bust_in_silhouette: Asked By literallynick_

So, I recently followed Heartbeast’s platformer tutorial where he taught us how to do a platformer movement which I absolutely loved, I made a RayCast and then slapped code to flip the RayCast

extends KinematicBody2D

const UP = Vector2.UP
const GRAVITY = 20
const SPEED = 200
const JUMP_HEIGHT = -500
var motion = Vector2()

onready var rayCast = get_node("RayCast2D")

func _physics_process(delta):
motion.y += GRAVITY

if Input.is_action_pressed("ui_right"):
	motion.x = SPEED
	rayCast.cast_to = Vector2(50,0)
elif Input.is_action_pressed("ui_left"):
	motion.x = -SPEED
	rayCast.cast_to = Vector2(-50,0)
else:
	motion.x = 0

if is_on_floor():
	if Input.is_action_just_pressed("ui_up"):
		motion.y = JUMP_HEIGHT
motion = move_and_slide(motion, UP)

but now I have a question.
In a Platformer Prototype I am making, I have these ladders on the left side of the platform that when you jump next to em and the raycast is colliding with them and you hold a button, its supposed to stop the movement and freeze you in place and then when you hold jump button it should move you up and then you can continue platforming.
Would really appreciate the help :"D