Created a comet spwaner/manager for the game

scenes/comet_spawner.tscn

@@ -0,0 +1,8 @@
+[gd_scene load_steps=2 format=3 uid="uid://6c6g7e5v3ifr"]
+
+[ext_resource type="Script" path="res://scripts/comet_spawner.gd" id="1_ngrtm"]
+
+[node name="CometSpawner" type="Node2D"]
+script = ExtResource("1_ngrtm")
+
+[node name="Comets" type="Node" parent="."]

scripts/comet_spawner.gd

@@ -0,0 +1,38 @@
+extends Node2D
+
+signal comet_shot (size : int)
+signal screen_cleared
+
+const COMET = preload("res://scenes/comet.tscn")
+var comet_count := 1
+
+var viewport_size := Vector2.ZERO
+var random_position := Vector2.ZERO
+
+func _ready() -> void:
+	viewport_size = get_viewport_rect().size
+	for comet in range(comet_count):
+		random_position.x = randf_range(viewport_size.x - 100, viewport_size.x)
+		random_position.y = randf_range(viewport_size.y - 100, viewport_size.y)
+		spawn_comet(0, random_position)
+
+func _process(_delta: float) -> void:
+	viewport_size = get_viewport_rect().size
+	if $Comets.get_child_count() <= 0:
+		screen_cleared.emit()
+
+
+func spawn_comet(size : int, pos : Vector2) -> void:
+	var comet := COMET.instantiate()
+	comet.position = pos
+	comet.current_size = size
+	comet.exploded.connect(comet_cleanup)
+	$Comets.add_child(comet)
+
+func comet_cleanup(new_size : int, current_position : Vector2) -> void:
+	comet_shot.emit(new_size + 1)
+	if new_size >= 0:
+		for n in range(2):
+			spawn_comet(new_size, current_position)
+
+