I'm doing the same thing for my Animation college class.
This was very well done, the story, sound and all the little details were great :D
Not to be *that* starfish, but if you were interested in doing more, here's a couple things you should work on next time;
- You should try to up the frame-rate to 24/25, because that way you're going to a lot smoother animation.
- Definitely make sure your camera is stable.
- Did you do any forward planning for this? One of the biggest things we learn in our class is about keyframes, inbetweens and charts. Basically, pros will plan out the entire animation in drawing first, and then use their planned animation as a guide for how things in LEGO move. You don't even need to draw fantastically, so long as you've got a good idea of what motion each character should take.
- One thing you should add is "anticipation". You'll notice in a long of animated movies, before the character performs an action, they'll actually swing the opposite way and essentially tell the audience what they're about to do. For example, a character who is about to run will usually lean back for a second and then launch themselves.