Impossible puzzles and bad English translation
English text in the game is mostly incomprensible. Seems like a really poor machine translation from another language, probably Japanese or Chinese. In several of the puzzles I had to use the game hints to get the solution since I didn’t see how to use the game clue to solve the puzzle. Even with the solution shown in the hint I was unable to understand the relation between the clue and the puzzle solution. I don’t mind challenging puzzles but several seem more like riddles with solutions that only the developer will know.