Why my enemy Spawner does not work?

Question

Hi i am working at a side scrolling space shooter and i made a ememy generator inspired by this guy and everything worked until i need to add one more enemy to the spawner (this video). I do every thing that he does but the first time it spawned enemy but by lasers did not collide with them and second time didn't spawn enemies at all. I tried to reverted to what it was but now that did not work as well. I'm confused what can i do? i did not show me any errors.

Comments

Please provide the code for the project, or even better, the entire project folder.

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hi this is my code:

Player.gd:

 extends AnimatedSprite

export (int) var speed = 150
var velocity = Vector2()
var timer = Timer.new()
var player_alive = true
var can_shoot = true
var fire_rate = 0.25
var health = 4

const screen_width = 320
const screen_height = 180

var laser = preload("res://Scenes/VFX/Laser.tscn")
var explosion = preload("res://Scenes/VFX/Explosion.tscn")

signal create_laser(laser,location)
signal instance_node(node, location)

func _ready():
    add_to_group("Player")
    self.play()
    Global.player = self
    timer.set_one_shot(true)
    timer.set_wait_time(fire_rate)
    timer.connect("timeout",self,"on_shoot_timeout")
    add_child(timer)

func _exit_tree():
    Global.player = null

func _process(delta):
#screen restrain
    position.x = clamp(position.x,8,screen_width-8)
    position.y = clamp(position.y,8,screen_height-8)
# shoot 
    if Input.is_action_pressed("Shoot") and can_shoot:
        Global.play_sound("Shoot")
        emit_signal("create_laser",laser,global_position)
        can_shoot = false
        timer.start()
    #movement
    velocity = Vector2()

    if Input.is_action_pressed("ui_right"):
        velocity.x +=1
    if Input.is_action_pressed("ui_left"):
        velocity.x -=1
    if Input.is_action_pressed("ui_down"):
        velocity.y +=1
    if Input.is_action_pressed("ui_up"):
        velocity.y -=1
    position += velocity.normalized() * speed * delta

    #check if player he still has health
    if health <= 0:
        Global.play_sound("Explosion")
        emit_signal("instance_node",explosion,global_position)
        queue_free()  
        Global.reset = false

#emit explosion signal and queue free the player
func _on_Hit_box_area_entered(area):
    if area.is_in_group("Enemy"):
        health -= area.get_parent().damage
        Global.play_sound("Hit")
        emit_signal("instance_node",explosion,area.global_position)
        area.get_parent().queue_free()

func on_shoot_timeout():
    can_shoot = true

Asteroid.gd:

    extends AnimatedSprite

export var speed = 75
export var health = 1
export var points = 5
var check_laser = 0

var explosion = preload("res://Scenes/VFX/Explosion.tscn")

signal instance_node(node,location)

func _ready():
    $Hit_box.add_to_group("Enemy")
    play()
    if Global.world != null:
        connect("instance_node",Global.world,"instance_node")


func _process(delta):
    global_position.x -= speed * delta

    if global_position.x < -10:
        queue_free()


func _on_Hit_box_area_entered(area):
    if area.is_in_group("Laser"):
        check_laser +=1
        health -= area.get_parent().damage
        if check_laser == 1:
            if health <= 0:
                Global.play_sound("Explosion")
                Global.score += points
                emit_signal("instance_node",explosion,global_position)
                area.get_parent().queue_free()
                queue_free()

Enemy_generator.gd:

    extends Position2D

var asteroid = preload("res://Scenes/Enemies/Asteroid.tscn")
signal instance_node(node,location)

func _on_Timer_timeout(): 
    randomize()
    emit_signal("instance_node",asteroid,Vector2(328,rand_range(0,180)))

---

Global.gd (Singleton):

 extends Node

var world = null
var asteroid = null
var player = null
var sound_controller = null

var reset = true

var score = 0

func play_sound(sound):
    if sound_controller != null:
        if sound_controller.has_node(sound):
            sound_controller.get_node(sound).play()

Laser.gd:

extends AnimatedSprite

export (int)var speed = 150
export (int)var damage = 1

func _ready():
    self.play()
    $Hit_box.add_to_group("Laser")

func _process(delta):
    global_position.x += speed *delta

    if global_position.x > 330:
        queue_free()

---

Game_UI:

extends CanvasLayer

var array =["Big","Small"]
var speed = 50

func _process(delta):
    for item in array:
        match item:
            "Big":
                for i in range(1,9):
                    get_node("ParallaxBackground/big_stars/big_star_" + str(i)).play()
                $ParallaxBackground/big_stars.motion_offset.x -= speed * delta
            "Small":
                for i in range(1,16):
                    get_node("ParallaxBackground/small_stars/small_star_" + str(i)).play()
                $ParallaxBackground/small_stars.motion_offset.x -= speed * delta
    for x in range(1,4):
        get_node("Heart"+str(x)).play() 
        if Global.player != null:
            var health = Global.player.health
            match health:
                1:
                    $Heart1.animation = "death"
                2:
                    $Heart2.animation = "death"
                3:
                    $Heart3.animation = "death"
                4:
                    continue

    $Score.text = "Score: " + str(Global.score)

Explosion.gd :

extends AnimatedSprite

func _ready():
    play()

func _on_Timer_timeout():
    queue_free()
    if Global.reset == false:
        get_tree().reload_current_scene()
        Global.reset = true

---

World.gd:

extends Node2D

func _ready():
    Global.world = self

func _exit_tree():
    Global.world = null

func _on_Player_create_laser(laser, location):
    for i in range(1,4):
        var laser_instance_i = laser.instance()
        add_child(laser_instance_i)
        match i:
            1:
                laser_instance_i.global_position = location + Vector2(11,-4)
            2:
                laser_instance_i.global_position = location + Vector2(13,0)
            3:
                laser_instance_i.global_position = location + Vector2(11,4)

func instance_node(node, location):
    var node_instance = node.instance()
    add_child(node_instance)
    node_instance.global_position = location

In my oppinion i think that the signal is not received by instance_node function but i really don't know why?

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have you checked your collision layers and collision masks?

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I never use them them but I think I'll try to implement them.