It's not bad for a beginner film. Definitely got room to grow, though.
A few tips: Try and be consistent with your audio, including the sound effects, music, and ADR (when you re-dub in the lines in post production). Also, make sure your actors don't look directly at the camera for the film itself. I also suggest not dubbing in lines from the show like what was done with Skull. Oh, and the part with Fang. If you're not able to animate yourself, it's best to not try and plug in stuff from the show. The main thing you want is consistency. Best way to handle Fang if you couldn't do the CG for it would have been stop animation, though I know it's time consuming.
Again, not a bad start. Keep at it, I'm sure we'll see more good stuff from you guys.