title screen

levels/base_level.tscn

@@ -1,5 +1,6 @@
 [gd_scene format=3 uid="uid://f2gxwphgniru"]
 
+[ext_resource type="Script" uid="uid://vfvpb7ptujn0" path="res://levels/level.gd" id="1_63c5o"]
 [ext_resource type="PackedScene" uid="uid://cv5p3w87nk0wn" path="res://player/player.tscn" id="1_wevqg"]
 [ext_resource type="Script" uid="uid://bayj73ugmsbd" path="res://levels/enemy_spawner.gd" id="2_ew5uy"]
 
@@ -11,6 +12,7 @@ geometry_source_geometry_mode = 1
 agent_radius = 1.0
 
 [node name="BaseLevel" type="Node3D" unique_id=815380624]
+script = ExtResource("1_63c5o")
 
 [node name="NavigationRegion3D" type="NavigationRegion3D" parent="." unique_id=845356554]
 visible = false

levels/enemy_spawner.gd

@@ -46,6 +46,7 @@ func _process(_delta: float) -> void:
 			doomed_point_idx = doomed_point_idx % MAX_CACHED_POINTS
 
 func _on_timer_timeout() -> void:
+	if not Level.is_active(): return
 	if points.is_empty(): 
 		push_warning("tried to spawn enemy, but can't find a point!")
 		return

levels/level.gd

@@ -0,0 +1,25 @@
+class_name Level
+extends Node3D
+
+signal level_started
+
+static var level: Level
+
+@export var active := false
+var start_time_msec := 0
+
+static func start_game() -> void:
+	if level:
+		level.active = true
+		level.level_started.emit()
+		level.start_time_msec = Time.get_ticks_msec()
+
+
+static func is_active() -> bool:
+	if level:
+		return level.active
+	else:
+		return false
+
+func _ready() -> void:
+	level = self

levels/level.gd.uid

@@ -0,0 +1 @@
+uid://vfvpb7ptujn0