Erk.
I'm not gonna mark you down cos you used tweens (they can be really effective and helpful sometimes, check out the Xombie series or shorts like Larvae /Creep/David Firth stuff), but you had hardly any actual animation at all on a really, really simplistic character design.
I'm guessing the only reason a cartoon about some kid singing Spongebob Squarepants has a score over 3 is 'cos its about one of the biggest games in the universe.
You get a five for the ending >: ) that was awesome.