I was sorely disappointed in the demo. The PC controls are very clunky, and you're better off using a gamepad for it since they didn't even try to make the UI PC-friendly, it's basically gamepad controls remapped - and it's extremely painful to use the mouse for plane maneuvering. Second, it's extremely narrow (at least the missions). You can't actually control anything other than the one unit you're currently in. In the demo campaign map, the AI would probably just finish the mission for you if you flew around sightseeing
I haven't tried the second skirmish map for the island capture, I guess I can give that a shot, but right now it sort of seems like the game that tried to be pretty to look at and big on scale, but you're just a little ant.