My very shitty program!

extends KinematicBody2D

const maxMoveSpeed = 210
const MoveSpeed = 120

var velocity = Vector2()

func _ready():
    pass

func _physics_process(delta):
    if Input.is_action_pressed("ui_escape"):
        get_tree().quit()
    else:
        pass

    if Input.is_action_pressed("ui_space"):
        textbox(open, 300w)

func textbox(open, 100w, 250w, 300w):
    if textbox == true:
        pass