Since you wanted reviews more than anything...
Your idea sounds good, but you only TOLD us what the story is supposed to be in the comment box of the animation page: you didn't SHOW us. Rule #1 of all filmmaking: if you can show what's happening instead of say what's happening, BY ALL MEANS, DO IT THAT WAY! I understand that this is only a teaser, of course, but the principle still applies.
Aesthetically speaking, your characters look fine, but you might want to work a little more on the backgrounds. Make them eye-popping and interesting. As they stand now, they're just a couple of lines filled in with some gradients. The key to making animation that really catches people's attention is in creating wonderful backgrounds that the characters can seamlessly interact with. If you work on that, people will notice, and it will show in your final score.
You've got a long, tedious road ahead of you, but stay the course and remember that though you may feel like killing yourself, ALL animation takes ridiculous amounts of time and patience.