Let me start by saying that this was a fun film and you should be proud of it. You clearly focused on character interactions and giving each character a unique (written) voice, and I think that's fantastic. The primary reason for this film's ranking was that the judges weren't sure how it fit the theme requirements. Our intention had been for "movie magic" to mean innovative technical work within a film, but we didn't see a lot of that here so I'm curious how you interpreted the theme. As plot goes, it was coherent throughout, so that's great. This is probably more of a personal critique than anything, but less reference to other brickfilms in dialogue might be a good idea. For people outside the BiM community, they come across as "huh?" moments, where you were clearly making a joke but the audience isn't in on it.
Here are some basic things you can work on: a few shots show the edge of your set, so be careful to frame your shots so that isn't visible. Your animation does the job, but if you keep practicing I think you can get a lot better, which will help make those fight scenes really stand out. A minute and a half is a bit lengthy for credits (it's about 1/4 of your total runtime) but you did put them at the end so that's not really a problem so much as an observation.
I hope you don't feel bummed out by your placement in the contest. You really did pull together an entertaining brickfilm and I think you have a bright filmmaking future ahead of you. Thanks for entering the contest.