A good game, great graphics, incredibly beautiful UI. However, I had the following problems with it:
1) at level 2, the top player arrived faster than the bottom one, however, without the second player having reached the mirror, the window with "You finished" already appeared on the screen, although player 2 was not yet to the mirror (however, the level didn't let me move on until I brought player 2 to the mirror as well).
2) The appearance of the game is a bit boring. From the cover image, I thought the game would be a bit cooler... (not that it's a problem or anything, but some players might feel tricked and might give you hateful comments).