The game is pretty and the atmosphere is interesting, but it is not enough to make a good game.
This game cumulates two huge problems:
1st one, puzzles that aren't puzzles. You don't guess the solutions in this game, you literally just read them on walls or on pieces of paper. In a good puzzle game, the player should feel intelligent when he manages to solve a puzzle. Here I just felt as if I followed instruction without thinking, which is not at all rewarding.
2nd one, "welcome player. To continue your adventure, you'll need to gather 3 blue spheres. Oh… you only have 2 ? Well you'll just have to go all the way back from where you started to find the 3rd one, because you aren't going anywhere without it". This problem (or should I say, this cliché) is frustrating enough in classic point and click adventures, it really didn't need to be implemented in a game that empty.
To summarise: pretty game, bad core gameplay.