Needs more speed with the kicks and punches

Pretty good, just keep practicing with frame rate and the speed of everything than it will look much better.

better if he was hitting somebody.
smoother, but I think its too fast personally
if thats some random combo, nice
but if not, then no because no human would be stupid enough to fight anybody like that unless its an anime or they are badly unexperienced. That Doesn’t mean go look up how people fight, just a suggestion. But if your trying to do a quick fast anime combo, that looks pretty decent but I would suggest a person to hit while training that type of animation type, and more effects but don’t add any effects yet, only when you finish the basics and the become pretty mediocre at this type of animating.