Thanks for answer and one more thing if i buy this game connected with this gmail when developer uploads update here i can download it?
Viewing post in (WIP) Hailey's Treasure Adventure(+18) comments
Itch.io remembers your purchases. So you can get to paid content through "My library" at top right. Or at landing page of any product at the top will be notification that you own that product and link do download. And also Itch will notify you when product you purchased has been updated via mail.
That is my general experience with this platform.