JUICE: Lots of particles, lots of sound effects. Overall, very juicy. The screenshake was good, but sometimes it just seemed to tilt to one side, which was more disorientating than satisfying.
Gameplay: Really cool idea, and the mirrored inputs work well once you get used to it. It would be nice if the difficulty ramped up a little slower, to give more time to experiment with the control scheme. Also, it would be good if enemy attacks were a different colour from the player's attacks.
Graphics: Good pixel art! I really liked the light-world / dark-world versions of the sprites. That was cool.
Sound Design: Very energetic music, and a lot of pew-pew-pew. Good fun :)
Respect of the Themes: Great interpretation of the "mirrored" theme. It makes for a game with a really unusual control scheme.