Grossly inaccurate
Everyone knows that Mercury was Jupiter's bitch. Get your facts straight.
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Okay, parody reply over.
Art: not bad.
Animation: Also well done.
Style: Entirely inconsistent, although I guess that was kind of the point.
Story: There wasn't supposed to be one, so skip that.
Sound: Good quality, but too much overlap with the voices.
So as much as I personally didn't care for this, my honest overall rating is: 8/10.