Since the launch last week feedback has been generally positive. I'm working on a patch with some minor changes to the main menu and game progression which have confused people. There'll be a new aircraft selection screen which lets you choose your craft and give an indication of the difficulty level that comes with each one. (short version: ALTO, the transparent black one is weaker and harder to control than SONATA, the smooth silver one).
Additionally, you'll be able to get an collection of MP3s from the game soundtrack installed just by completing the game with either aircraft.
For more information, check out Substream here...
Substreamgame.com