Created an invader spawner that gives points when shot

scenes/game.tscn

@@ -1,10 +1,11 @@
-[gd_scene load_steps=6 format=3 uid="uid://bdarunpk3c2eh"]
+[gd_scene load_steps=7 format=3 uid="uid://bdarunpk3c2eh"]
 
 [ext_resource type="Script" path="res://scripts/game.gd" id="1_6727i"]
 [ext_resource type="PackedScene" uid="uid://cbo47ftx0vcro" path="res://scenes/ship.tscn" id="1_esyqo"]
 [ext_resource type="FontFile" uid="uid://bkcxbtx1vcj8w" path="res://assets/fonts/Color Basic.otf" id="2_gwtm0"]
 [ext_resource type="PackedScene" uid="uid://0yktrbyp6cr3" path="res://scenes/game_over_screen.tscn" id="3_yy075"]
 [ext_resource type="PackedScene" uid="uid://cemhlom425afn" path="res://scenes/stars.tscn" id="4_064lo"]
+[ext_resource type="PackedScene" uid="uid://e647ck5fxo17" path="res://scenes/invader_spawner.tscn" id="5_itvtr"]
 
 [node name="Game" type="Node2D"]
 script = ExtResource("1_6727i")
@@ -58,8 +59,11 @@ color = Color(0, 0, 0, 1)
 
 [node name="Stars" parent="Background" instance=ExtResource("4_064lo")]
 
+[node name="InvaderSpawner" parent="." instance=ExtResource("5_itvtr")]
+
 [node name="Ship" parent="." instance=ExtResource("1_esyqo")]
 z_index = 1
 position = Vector2(622, 309)
 
+[connection signal="shot" from="InvaderSpawner" to="." method="_on_invader_spawner_shot"]
 [connection signal="crashed" from="Ship" to="." method="game_over"]

scenes/invader_spawner.tscn

@@ -0,0 +1,14 @@
+[gd_scene load_steps=2 format=3 uid="uid://e647ck5fxo17"]
+
+[ext_resource type="Script" path="res://scripts/invader_spawner.gd" id="1_y3j7g"]
+
+[node name="InvaderSpawner" type="Node2D"]
+script = ExtResource("1_y3j7g")
+
+[node name="SpawnTimer" type="Timer" parent="."]
+wait_time = 30.0
+autostart = true
+
+[node name="Invaders" type="Node" parent="."]
+
+[connection signal="timeout" from="SpawnTimer" to="." method="_on_spawn_timer_timeout"]

scripts/game.gd

@@ -38,6 +38,10 @@ func game_over() -> void:
 	if score > high_score:
 		save_score()
 
+func _on_invader_spawner_shot() -> void:
+	# This is not the most modular way to do this.
+	score += 500
+
 func increase_score(comet_size : int) -> void:
 	# We add one since comet_size starts count at 0
 	comet_size += 1
@@ -59,5 +63,3 @@ func load_score() -> int:
 		return file.get_var(score)
 	else:
 		return 0
-
-

scripts/invader_spawner.gd

@@ -0,0 +1,26 @@
+extends Node2D
+
+signal shot
+
+const INVADER = preload("res://scenes/invader.tscn")
+
+var can_spawn = false
+
+func _process(delta: float) -> void:
+	if can_spawn:
+		spawn_invader()
+		$SpawnTimer.wait_time = randi_range(20, 40)
+
+
+func _on_spawn_timer_timeout() -> void:
+	can_spawn = true
+
+func spawn_invader() -> void:
+	var invader := INVADER.instantiate()
+	invader.shot.connect(player_shot)
+	$Invaders.add_child(invader)
+	can_spawn = false
+	$SpawnTimer.start()
+
+func player_shot() -> void:
+	shot.emit()