Just fantastic. There's three kinds of levels: you have to work together (think of Mario), you have to do the same and/or you have to slumber in the dark (think of Rayman). You can make it your own game and you can decide how difficult the game will be. Are you happy with a B rank, or do you accept the challenge and are you going to control the characters at the same time? anyways, I think this sweet adventure game is underrated. Here, 5/5!
Some levels take really long, and before you have to figure out the right commands. After the basic levels I began to get lazy after the 3 levels so I had decided to take a guide, lay back and watch some music videos on YouTube :$ I'm not really the type of person being that patient for this game, but I the concept is good :) The music is also fine.
Refractions are easy as hell (at least, they are to me) and at the beginning of the game I thought: funny game, but not so hard. Playing the game towards the end it's getting more and more interesting. Good for a sequel and eventually for a players' pack. You can really do something with this game!