quite hilarous and thinks of your child hood in the mountains :P
Not bad for a first attempt.
Animation: Smooth, flawless, looks like you've already got this covered.
Graphics: Alright, but a little bland. Instead of giving everything one or two colors, you could maybe add a little contrast/color variation in the future.
Sound: Perfect for the scene, great choice.
Overall: In terms of overall enjoyability, I'll have to go with "meh", though I can definitely see you going places in future animations.
For your first "real" attempt, that was great. Smooth and clean animating, sounds were timed nicely. Very simple but well executed. I applaud you sir.
Very nice flash. Good animation and well used sounds. I'd work a bit on enviroment detail and character detail (guy looks totally like from a Terrence or Phillip from South Park).
Other than that all's good. Keep at it :)
Guy: I believe I can fly!
Good job man.