Why do those ducks do so much damage? Jeez...
And if you think about it, aren't the first enemies you see in this game suicide bombers trying to bomb an actual terrorist? Makes you think again about terrorism, doesn't it?
Actually though, great game. It's pretty difficult, but not unfair. When you die, you're forced to blame yourself. Not many games like this can do that. Good job. I love everything about this game. Just one suggestion: Maybe you could buy a scanner or something like that on the second or the last ship you buy, something that marks enemies that damage you for 5 or so seconds. So you can get revenge faster and easier. And for those people who have a strategy for this game.
But yeah, other than that, the mechanics are pretty much as good as they can get.
EDIT: Wait, kamikaze planes, too? Oof.