I do understand that the animation was rendered in 12fps(I wanna make that clear), but the characters do move incredibly slow. Try taking inspiration from the outside world and people-watch. See how normal people move briskly transitioning from one movement to the next, every part starting and stopping at different times and intervals.
Not only is the motion incredibly slow but also it never stops. There's no point in which the stick figures are still, every part is in constant transition to the next stage. This results in an arm slowly adjusting for 5 seconds from one stance to another in a linear path, when in reality the arm would move after the leg has already begun its shift, and still finish moving more quickly because it carries less weight on it. The arm may also rubber-band back a bit once it hits its mark to give a little bounce(which is also realistic to a sudden stop).
The camera in contrast is very quick and gets a little sickening.
Besides animation, the sfx sound as though they were recorded in an air duct, which I know you can do better because your original music is in a much higher quality. Try playing with mixed tones and drumkits in your programs instead of going online for a cheap free download. Sound design is crucial to feel.
Lastly there's a really fuzzy aesthetic over the entire video; which unintentionally(I'm sure) looks like you rendered a 240p video and scaled upward.
Overall you just need more practice working on shorter animations to develop skills in creating more realistic motion before you start getting into more complex 3D work.