<insert large round of applause here>
That was wonderful... and funny too!
There are some really subtle things that say 'newbie' in any animation effort and you've managed to dispense with most of that in this short. Newbies of all ages can learn a lot from watching your animation.
Here are some things I think would benefit Newbies a lot:
1) You got rid of the default ground plane and came up with something that works well in every shot.
2) You found/created an interesting piece of music for your animation
3) You've kept things simple yet worked in some considerably more complex elements and actions. Nice.
4) You've varied your pacing throughout
5) You've got distinct beats to your actions... and a comical and very satisfying payoff!
My one suggestion would be this... use some formof post processing on your animation to mute/blend the color and saturation.
This would help to set and keep the mood going throughout. There is currently a same-sense of saturation with little variation throughout. Dirty it up a bit! If working this aspect within the animation itself that might be accomplished through the introduction of an overhead swinging light? As you've rendered this out already... you've still got post processing.
My first thought was to suggest using the Post Effect 'Film Grain' but... not too sure about that.
I like it. I like it a lot.