If you use the camera function in an empty room, you may occasionally find hidden clues.
This allows people who find puzzles too difficult to solve with ideas to reach the correct answer once they have tried their best to search for it.
This hint is an example of a solution to a difficult stage, but I have made 10 stages mainly based on the stages that were difficult to solve by referring to the YouTube archives of various commentators.
If a stage has more than two maps, a hint has been made on the same map for each map.
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In very rare cases, something other than hidden clues can be found.