too sloppy
it's alright for a small sample of a game; i didn't notice many bugs. you might want to change the "hit area" for your buttons, so that the player can click anywhere in the immediate vicinity of the text, instead of only on the actual font (which is almost too thin to accomplish this on). the music is good, and the animation is alright. i noticed another couple things, which may or may not concern you: when you defeat the imposter, their life will go into the negative but they will still attack before the screen displayed "victory", and also, when you use the magic power, the screen stays black for the actual attack... not sure if that was supposed to happen.
i'd mostly work on the style. the screen is a bit too jumbled. just organize things a bit, maybe add some colorful backdrops behind the text areas.