Good
The animation was great. All of it is well drawn. It's easy to tell that you spent a lot of time on it. The facial expressions in the beginning of the animation and the proportions of the protagonist at the end of the flash were strange, but in a funny way that seems to parody anime characters' awkward movements and expressions.
The quality of the animation was good, but fluidity seems to have been sacrificed. More effort could have been made to add fluidity to the animation and perhaps slowing it down to give the viewer a chance to comprehend what they are watching. Not by a lot, but enough that viewers do not feel that they are rushing through the animation in ten seconds.
The audio could use some work. The sound effects were good and, although there was nothing particularly bad about the music, it sounds a bit generic for a robot-fighting anime-style flash. The audio does fit the theme, though.