cool but the plot made no sense
It was pretty good. only recommendation would be to make more detailed backgrounds. Well, maybe not more detailed but ones with more texture. It might help your characters pop out more because of their simplistic form. Also, more detailed backgrounds don't take as long to make as making detailed characters that have to be animated with more difficulty.
I should be getting a drawing tablet shortly. Everything there is usually handdrawn and then retraced on the computer, so my animations have always been a bit... limited in motion and in detail. I thought Sigma came out decent for the most part, X was passale. Backgrounds were... well limited. It would've been cool to have gotten the generator in the background like in the actual battle. Well, as they say, there's always more room for improvement. :D
It was pretty good. One improvement would be to add a background layer to your buttons so that you don't need to click on the actual font to use it.
Alright, sounds good! Most of my menus have rectangular buttons, I'm not sure why I set it just to text on this one. If I get around to updating this, I would want to add Zero at the beginning blowing the hole in the ground and an animation of X shooting the button when clicked.