Didn't like the joke.
Okay, you've got the art skills: awesome graphics, animation, and great background. (I have to admit, the blast was well animated and cool)
However, the punchline at the end wasn't funny and didn't make me laugh. The voice acting could use more "oomph" and drama to add some humor. From your comments, the alternate ending would have been better and funnier. to me at least.