I also think that this game is right between a 3 and a 4. For me, the atmosphere, story, and ease of solving the puzzles tip the scale towards a 4 instead of a 3. The mechanics of the game are introduced nicely and I never felt surprised by anything that I needed to do. A big positive aspect is that you do not get punished if you make a mistake; at least for me there was always a (sometimes a little time consuming) way to undo what I messed up and fix it. The puzzles are always logical and I found it straight forward to come up with the solution (even though at times was not that simple to execute it. That said, the puzzles get somewhat repetitive and much more linear towards the end. The last ~20-30 minutes feel like the designers also wanted to finish the story and didn't (want to) come up with new puzzles. Additionally, there are a few sequences where timing is important or fairly precise moving is required, which I find distract from the rest of the game. Another problem is the saving: as mentioned in other reviews, the game saves automatically at certain spots, but I never saw any message...but it still worked the couple times I needed to quit (I did it right after starting a new chapter). Overall, it is a solid, easy puzzle game without any bugs or game breaking problems for a few hours of entertainment. It took me about 7 hours to finish the game and I do not see any good reason to replay the game. To find missed secrets the individual chapters can be replayed individually, but except for completionists/achievement hunters .
