You asked for animation critique, so...

I kind of noticed that the characters make big mouth movements all the time. I understand that their mouths should be very expressive, but they kept opening their mouths ALL THE WAY for even the minimal movement. You need to have times where the characters have a smaller range of opening/closing their mouths to contrast with the times they NEED to have their mouths open really wide to be expressive.

I hope that makes sense.
(BTW, the 9/10 rating isn't because of this. I just don't like handing-out 10's)

The medals aren't working.

Other than that, this is a fun game.
Though I feel like I'm not using any actual skill to beat it; it's a bit of a button-masher, and its too easy. The arenas are nice and varied, but some platforms are awkward to jump on/off. The drawn poses of the characters could have looked better, too.

That was fun

But most of the source links didn't work, and the ones that did, lead me to the Age of the Earth page.

Also, I think it would help if you have some way of showing what question you are on and how many are left.

And on a smaller note; the pictures to the right were disturbing.