Incredible game. The environments blew me away. The controls made me feel like I was learning to fly, the more I played the better handle I got in maneuvering through caves and around cliffs. There are no objectives in this game, all the worlds are open from the start. You just fly around and enjoy.

BTW, I played this on a 144hz monitor (and compared it to 60) and it really makes a difference. Try it out if you can.