refactor to state machine

scripts/in_game.gd

@@ -1,13 +1,10 @@
 extends Node3D
 
-const template := "FPS: %d\nPing: %d ms"
+const statsTemplate := "FPS: %d\nPing: %d ms"
 
 var runner_scene := preload("res://scenes/runner.tscn")
 var _ping := 0.0
-var _runners_node: Node3D
-
-func _ready() -> void:
-	_runners_node = get_node("RunnersNode")
+@onready var _runners_node: Node3D = %Runners
 
 func spawn_player(player_id) -> void:
 	if multiplayer.is_server():
@@ -21,7 +18,7 @@ func _process(_delta: float) -> void:
 	if DisplayServer.get_name() == "headless":
 		return
 
-	%RichTextLabel.text = template % [
+	%StatsLabel.text = statsTemplate % [
 		Engine.get_frames_per_second(),
 		_ping,
 	]