Nothing too new except for the raven.
I'd suggest adding some sort of "coasting" action so that a release of the mouse button doesn't start to drop you immediately; it would feel more realistic. And since the raven is rather realistic, how about some more realistic obstacles?
I like how the colours changed when i got to stage too. My score was 1337. That made me laugh, haha. Overall, Pretty standard game. It's okay. Needs a little bit more. Maybe power-ups that make you invincible, or ones that make you slow down. Good start though.
Not very original but still entertaining.