and i didn't just write this because i owe you....
was this all done with a mouse? if so, then you do deserve some extra credit. The only animation i've ever had to do with a mouse is stick figures, so i have to assume this whole movie took an especially long time.
on the plus side, there were some genuinely funny parts to this movie that made me chuckle. (the part where Grinch-laden sewed his hands to the fabric for example). and the animation wasn't too bad considering the tools you had to work with. so nice job on that
the movie could have benefited from some background music though. it needed more than just some music at the end. you'd be surprised how some ambient background noise (or music) adds to the movie. it makes it sound more finished.
also, the voice quality was kind of low, but I can understand that entirely because it is extremely difficult to change the pitch of your voice without altering the speed. I had a hell of a time doing that for my elf in my flash. (I ended up using 3 different programs to work on the same audio file)
So good job. I didn't give you this score because just because you did me a favor... but I did give you a 5/5 for that reason :-)