feat: Implement the core Stop 'n' Go game mechanic, including its manager, main scene, and associated animation assets.

scenes/main.gd

@@ -16,6 +16,7 @@ var portal_mode_winner_id: int = -1
 var is_match_ended: bool = false
 var obstacle_manager
 var portal_mode_manager
+var vfx_manager
 
 # Minimal local state
 var _connection_check_timer: float = 0.0
@@ -219,6 +220,11 @@ func _init_managers():
 	add_child(obstacle_manager)
 	obstacle_manager.initialize(self , $EnhancedGridMap)
 	
+	# NEW: VFX Animation Manager for Ready-Go, Stop-Phase, etc.
+	vfx_manager = load("res://scenes/animation.tscn").instantiate()
+	vfx_manager.name = "VFXManager"
+	add_child(vfx_manager)
+	
 	# Connect signals for UI updates
 	goals_cycle_manager.timer_updated.connect(_on_timer_updated)
 	goals_cycle_manager.score_updated.connect(_on_score_updated)
@@ -349,18 +355,17 @@ func broadcast_message(player_name: String, message: String, type: int = Message
 	add_message_to_bar(player_name, message, type)
 
 func _start_pre_game_countdown():
-	"""Show a 3-second countdown on all clients before starting."""
-	for i in range(3, 0, -1):
-		if can_rpc():
-			rpc("sync_countdown", str(i))
-		await get_tree().create_timer(1.0).timeout
-	
+	"""Trigger the premium Ready-Go animation on all clients."""
 	if can_rpc():
-		rpc("sync_countdown", "GO!")
-	await get_tree().create_timer(0.5).timeout
+		rpc("sync_ready_go")
 	
-	if can_rpc():
-		rpc("sync_countdown", "")
+	# Delay game start until the 4.0s animation finishes
+	await get_tree().create_timer(4.0).timeout
+
+@rpc("call_local", "reliable")
+func sync_ready_go():
+	if vfx_manager and vfx_manager.has_method("play_ready_go"):
+		vfx_manager.play_ready_go()
 
 @rpc("call_local", "reliable")
 func sync_countdown(text: String):