feat: Implement initial main game scene including game world, player UI, and touch controls, along with a new UI manager script and ranking graphic asset.

scripts/managers/ui_manager.gd

@@ -230,14 +230,19 @@ func _connect_powerup_manager_deferred(player):
 # =============================================================================
 
 var powerup_bar: PanelContainer
+var powerup_ready_rect: TextureRect
 var powerup_segments: Array = []
 
 func setup_powerup_bar_ui(main_node):
 	"""Get reference to existing PowerUpBar in scene and cache segment references."""
-	powerup_bar = main_node.get_node_or_null("PowerUpBar")
+	powerup_bar = main_node.get_node_or_null("PowerBar/PowerUpBar")
+	if not powerup_bar:
+		powerup_bar = main_node.get_node_or_null("PowerUpBar")
 	if not powerup_bar:
 		push_warning("PowerUpBar node not found in scene")
 		return
+		
+	powerup_ready_rect = main_node.get_node_or_null("PowerBar/PowerUpReady")
 	
 	# Get segment references from scene
 	powerup_segments.clear()
@@ -276,6 +281,12 @@ func update_powerup_bar(current_points: int, _max_points: int):
 			style.texture = load(tex_path)
 		
 		segment.add_theme_stylebox_override("panel", style)
+		
+	if powerup_ready_rect:
+		if current_points >= _max_points and _max_points > 0:
+			powerup_ready_rect.visible = true
+		else:
+			powerup_ready_rect.visible = false
 
 var _previous_bars: int = 0