Qantas has released a free simulator for mobile and desktop (You need both of them.) This sim allows you to fly the new Qantas dreamliner through rings.
Play at https://dreamliner.qantas.com/fly
Quick tutorial: https://www.instagram.com/p/BcSwNS-gAY6/?taken-by=qantas
What makes this better than IF? Well there is music in the background, there are clouds and you can fly at 11.76km/s without that stupid overspeed warning