added price economy

scenes/ball_vendor_object.gd

@@ -4,11 +4,18 @@ extends HBoxContainer
 @export var _ball_name: String
 @export var _ball_id: int
 
+signal update_ball_price(new_price: int)
+
 func _ready():
 	$BuyButton.texture_normal = _ball_texture
+	update_ball_price.connect(_on_update_ball_price)
 
 func refresh_ball_price(new_price: int):
 	$PriceLabel.text = "%s" % new_price
 
 func _on_buy_button_pressed():
 	SignalBus.on_try_buy_ball.emit(_ball_id)
+
+func _on_update_ball_price(id: int, new_price: int):
+	if _ball_id == id:
+		$PriceLabel.text = "%s€" % new_price