Not great
It isn't colorful enough. Black and white is never enough color. Color everything else in but grey it down using flashes built in color wheel. This took you twelve hours? Go look at what I did in 12 hours.
You need to take some pride in your work and not submit stick men videos. They're never good and never well animated. You need to take a lot more time in your animations, if you want advice to improve. Nobody has every made anything good in 12 hours. Not even me.