It's the most puzzling puzzle game I've ever played. Many levels give you that mental "oomph" and are satisfying to solve, which is an indicator of a good game. There are levels, however, that, once solved, cause even more confusion. Simply put, some levels demand too much time to solve and are too cryptic. The biggest problem, I think, is that there is too much freedom with what you can do, and it is often unclear what you can and what you can do because the tutorial is very sparse.
This is the only problem that I can find in a game that can be called even somewhat objective. Everything else negative comes from my reluctance to dedicate this game too much of my time. Nevertheless, it is still a good game and a person dedicated enough might find this game as one of his favorites.
Grade: 7,4/10