1.) Ugh. Where do I even begin. You need to work on your stickfigure construction. God, it's a stickfigure and you can't draw jack. Please take an art class so you can learn more.
2.) SFX? BGM? Where are they? Am I watching a powerpoint? Is it a slideshow? Dear Lord, even my baby cousin can make better crap than this.
3.) The fights? The action? The drama? The effects? There is no savior for this.
4.) Fast? Blurs?! CHRIST ENVOY! It's moving at a blistering speed that I can have a 2 weeks vacation, extend it for another week, come back and boot my slow laptop and it still hasn't moved on to the next scene.
5.) Story wise, it was original. I like the part when he stomped on the book. It symbolized the victims knowledge being "trampled" on, literally. Still though, add a little bit of twist. Maybe try to give the viewers hints that probably the honor student swapped his paper with Stickboy using his time travel powers. You could expand this too! It has a lot of potential and it CAN be a good story. Again, just add more spice to it and it should be good.
Overall, it was mediocre. The only thing that kept me going was the storyline.
Personal Note:
12 basic principles of animation.