Is this game bad? No. But it does have problems. And you cannot not compare this to the first one. The puzzles are still here, and mostly good, but the new ones that they added aren't as good. "Backwards" is effetively a combination word search and crossword puzzle that becomes trivially easy once you realize that, on a computer version, you can just black out the entire board and then erase the words. They altered Fitwords so that you can grab and drag words onto the board, which is very useful... when it works. They've updated a lot of features, made the resolution bigger, made Link-a-Pix be a scrollable window now instead of trying to jam everything onto one screen (a change I didn't like a first, but it is growing on me), they added a Master mode with harder puzzles once you've played through enough in Challenge mode. They added a trophy room. There are problems with Picture Quiz where some of the answers are subjectively wrong (for example, asking you to count something in the picture, but the answer is only from one portion when there are others visible elsewhere). And, the biggest change from the first, this one seems to be locked in UK English. So, for the American audience, there are going to be spelling errors and references/phrases that don't make sense. All in all, if you really like these kinds of puzzles, and have already burned through the first game, then yea, pick this one up. But if you haven't finished the first, stick with it. You'll be glad you did.
Further information: The game contains some fairly serious bugs. Typing in "0" while in a Sudoku game will break the UI and render Sudoku unplayable until you restart the game. In Master Mode, you can't scroll past the first 16 puzzles, even if there are more available. You can click below them and get extra puzzles, but only four of them. This means some puzzles, and thus some in-game trophies, are unobtainable.