Really, I'm on the border line with recommending this game. It's visuals are stunning, the audio is great. The background music can get a bit repetitive, but the tunes are calm enough that you don't mind. The concept is wonderful, I'm a big fan of puzzle games and when I saw where this game started I was very excited.
But it sort of flat-lined. Even within the first world I was getting bored. There was just enough new concepts introduced to keep me playing, but I found the difficulty of the game to not be in the puzzle-solving but in the controls. I knew exactly what to do, but I couldn't get my darn keyboard-touchpad-click combo control madness to make it happen. Definitely needs to let you set your own controls (wasd without an option for "w" as jump instead of space? Seriously?) Plus, I'm playing on a Mac laptop, and right-click left-click as one of THE main controls got incredibly tricky with a touchpad and no mouse.
The story could also use a little work. A good storyline can save a bad game sometimes. But this had little story, and relied entirely on the puzzle-solving, which as previously mentioned was weak.
100%ing this game would get really tedious. If you're into that kind of thing, this is for you.
Definitely worth a try though. If you get it in a bundle or as a gift, cool.