A.T.-K.A. Demo Beware of glitches is right!
You seem to know what you're doing... but I see a few things you can fix right away.
For your animations, you seem to be missing the last keyframe, which causes you character to disappear.
Your super-move(the punchy one) moves you across the screen but doesn't keep you centered, thus moving him backwards when hes done, personally I dont like that but but thats just me.
And finally you have waaay too much health, I just pressed the right key the whole time and made it through with more than half of my health, thats less a glitch than an engine issue but that can be easily fixed.
Overall very good for a demo, and I can't wait to see a final product!