Whoa, What?
First off, I really like the background. The whole radial green gradient thing was simple but effective, and the rocks and stars and color scheme were pretty darn cool...
But the animation?! Definitely not! I don't see how people are saying it's smooth at all! The movements are extremely wobbly, and if you pause it and look at it frame by frame, it's because the body positioning is totally off! The limbs are not the right length and maintain no continuity between frames! The kick should have a lot more buildup, and then the kick should be sustained longer as your stick figure floats through the air a little bit, carried by his momentum, until he touches down.
As for the teleportation, the particle effects could use some work. They should be getting smaller and smaller with each frame, which you did, but you just made them vanish after a certain point. They should get smaller and smaller until you can barely see them, and then remove them entirely. On top of that, you need particles to expand outward from any type of explosion, to show the viewer that the teleportation cloud is smoke-like.