Very great Job Dude!
Dont lisen the bad Critics, they are Always Unskilled Assholds/Amateurs in Digital Art/Or Just Shitty Rat Kids
The animation is very great, the movements are very fluid to be made by hand.
I cant say anything about the leak of reflections/AO and GI, because I know the render times are very frustrating, the sketchy post effect is nice, but is very intense, the same ffect but with 20-30% of Opacity would be Nice, try to do find a most realistic sky, and a general blue light for the night, maybe GI or maybe only lue omni lights would be awesome, some red/orange lights too...
Good Job man, keep trying and learning, good luck \m/