The dude's hands on the first super power-up thingy that made the crater was weird and looks gay (as in homo). It would look better if it bent towards the head, not away from it.
The dude just exploding from the stomach was not natural because he hit on the head, not the stomach. Make the explosion on his head so it would look better. Also, animate the particles going toward where the punch's direction is, to make it look a little realistic.
The particles and effects could use a little work. You could watch the tutorials on youtube and just keep practicing animating them.
That run would look better if you made him take two steps then looped it, other than making him take one step then looping it. Like, animate him take a full step, then another step, then loop it. I don't know if I'm clear, I hope you'll understand.
Other than those, it looks nice.
