Not bad for your second.
Your stop motion was pretty smooth, could have been better, but not bad. The sound quality was a little choppy/weird volume changes, but overall, not bad! Keep with it and I'm sure you'll iron out some things and overall will be better as a flash artist.
The ending was hilarious!
But, ive got some advice. The NG preloaders does NOT work on a white background! also, dont show places without tracks (like that scene where they turned, and then disappeared into nothing, it looked weird.
Uh...
Decent job, but I'm pretty sure Lego movies are officially not allowed on NG anymore... someting about copyright infringment?
Sorry dude...
But no Lego submissions. If they were perfectly fine to submit, then this would probably pass.