Good, but a little repetetive
As much as I enjoy 'snake' games, this one was actually not a disappointment. the only thing I would say is maybe have some more levels with obstacles etc, and some different music tracks. Also, the game was over far too quickly in my opinion. Im not being harsh here, as I am aware that it is your first flash game, I'm just trying to give some tips.
Very well done for a first! I think with some practice, you'll be able to create some masterpieces. don't give up!