Luftrausers makes you feel like you're constantly in the danger zone.
Yes, that's a video review up there, and you should watch it. Because seeing the game in action will give you a much better idea of how the game feels than I could ever do with written words. That's important because this game is all about the feeling you get when playing it. It's an arcade shooter, so it exists just to make you scream in joy when you beat your high score, and curse when you take a wrong turn into a missile.