Thats great!,
I really like the animation, and this is just a wee point, but is the boomarang the wrong way round. That is, in your animation the character should be holding the other end of the boomerang. (End forward as oppose to the middle bend part forward).
I'm not sure, as I only have one boomerang and have only recently moved to Australia, so I'm probably wrong on the assumption that all boomerangs are thrown in the same manner.
The character's excited jump and clapping for joy show a wonderful amount of emotion.
Yours
Steve