fix enemy aligning, add sticks respawn

scripts/Main.gd

@@ -108,11 +108,31 @@ func _spawn_rocks() -> void:
 	for i in range(limit):
 		_spawn_single_rock()
 
+var sticks_on_field: int = 0
+var sticks_pending: int = 0
+const STICK_LIMIT := 2
+
 func _spawn_sticks() -> void:
-	for i in range(2):
-		var stick := STICK_SCENE.instantiate()
-		stick.position = _safe_item_position()
-		add_child(stick)
+	for i in range(STICK_LIMIT):
+		_spawn_single_stick()
+
+func _spawn_single_stick() -> void:
+	var stick := STICK_SCENE.instantiate()
+	stick.position = _safe_item_position()
+	add_child(stick)
+	stick.connect("destroyed", _on_stick_destroyed)
+	sticks_on_field += 1
+
+func _on_stick_destroyed() -> void:
+	sticks_on_field = maxi(0, sticks_on_field - 1)
+	if not game_active:
+		return
+	if sticks_on_field + sticks_pending < STICK_LIMIT:
+		sticks_pending += 1
+		await get_tree().create_timer(20.0).timeout
+		sticks_pending -= 1
+		if game_active:
+			_spawn_single_stick()
 
 func _spawn_single_rock() -> void:
 	var rock := ROCK_SCENE.instantiate()