As many of the other commenters have said, this is a game that aspires to be a Professor Layton game. Except, of course, there are a number of giant flaws that make the game completely unpalatable, unlike Professor Layton.
1. Puzzles are rather easy for the first three chapters ("Find the gigantic name scrawled on the wall and input it into the answer box.") and suddenly spike up to "lots of brute force required"-difficulty ("Which of these four hands of cards has the best chance of winning a game of Variant Poker?") during the last chapter. It's as if the developers had no idea who their target audience would be, so they just mashed up a bunch of random puzzles and riddles and called it a game.
2. Puzzles are ambiguously worded in many cases (The bug spray can't be "next to" the bugs? Is that "orthogonally" or "orthogonally and diagonally"?), thus making it impossible to determine which solution was intended. In some cases, multiple solutions are accepted, but in others, they are not.
3. The rhythm "puzzles". The game asks you to repeat the rhythm of a certain tune it plays. That's it. No puzzle elements in it whatsoever, so I'm really not sure what it's doing here. If I wanted a rhythm game, I would have bought a rhythm game, not a puzzle game. On this note [pun not intended], the tune always plays twice, save for one exception right in the middle of the game, which only plays once. This is unnecessarily annoying and time-consuming in the first instance, and disorienting in the second.
4. Completely unbalanced hint system. Either the hint system is useless (in that the information it gives you is information you already know), or that it gives you information you yourself couldn't work out (which defeats the whole purpose of a puzzle). In one particular case; namely, a puzzle asking you to count the number of mate-in-ones on a chessboard; the hint itself gives completely false information (a king moving out the path of a rook can only give discovered check in six ways, not seven).
5. No explanations for your answer's truth value. It only tells you whether your answer is right or wrong. Normally, this wouldn't be a problem. However, given the problems noted above, this just makes the game ridiculously unplayable, and turns the game into one of "Guess what the person who made this puzzle was thinking when he came up with an incorrect answer which we won't hint at!"
6. The puzzle resets itself if you get it incorrect (which, during the last few chapters, is practically inevitable). You got it incorrect due to a slightly misplaced piece? Have fun placing them back in.
7. Sliding puzzles. There are at least 40 of them in the game. However, as far as I dare to check, they are all of the same size (3x3), and there is a trivial method for solving sliding puzzles, making these pure timewasters.
8. Plot holes everywhere. What happened to the balloonist? Did Lukatello make it out alive? Is Doyle really completely incompetent at this whole "keeping one's intentions secret", and is May TRULY so stupid that she doesn't suspect a thing until Doyle meets Uter (yet is apparently intelligent enough to be able to solve brute-force 4-piece dissection puzzles in her head)?! How do we even know that that person IS Uter (and not one of Uter's lackeys), and that Doyle isn't merely Uter in disguise?!
The key difference between this "puzzle game" and any game from the Professor Layton series is that this game seems to want to be at odds with puzzle-solving immersion, as if the creators of the game hated puzzles with all their fortunes and wanted to intentionally ruin peoples' puzzle-solving experiences while raking in money for a garbage product.
All in all, it is an absolutely horrible game with no respect whatsoever for the player's time. Your £6.99 would be far better spent on, say, Braid, QUBE, or Sokobond; where the creator has actually test-solved all the puzzles and verified that they aren't completely outrageously impossible or broken. Don't even bother getting this game unless it's to verify my observations, in fact; I wouldn't even take it for free.
