Clever implementation of the jam focus. The idea of a crow finding a straw that makes him invincible reminds me of the plot of "The Gods Must Be Crazy." The graphics are very attractive, with an excellent palette and a cool "heat distortion" effect. The music is also pretty good.
I found the crow somewhat difficult to control, though. I think this is primarily because it moves so fast, especially on the vertical axis. I would fly above the viewable area of the screen and suddenly I would be far higher than I imagined, and it would be difficult to estimate when I would reappear on descent. For the same reason, I could hardly hit anything with the blowgun function...