Hey gotta say I really like the idea behind the game. The hard controls are kind of a game in themselves though heh..
I'm not sure if my mouse sensitivity is higher than yours but any real movement I made with the mouse would cause him to shoot left or right in a barrel roll but then when flapping I had to make a pretty tall movement to get him to get up there.
I really LOVE how when you get hurt the music will detune for a split second!
The camera in the menu and at the end of the level is cool too! I like how it swivels around and shows you the scene.
Scoring system was a nice touch too!
I like that you spent time on these little details :) stuff like that really adds a lot IMO.