Braindom 2 is a fun game but the levels can get pretty tricky. Here we have the answer for "There should be a secret room, find it." in Braindom Level 72. You can use the answer below or watch the video. One thing to be aware of is that the level number might be different for your puzzle. Sometimes the levels can get switched around so if that happens try to search for the question.
Answer
Press on all 3 books that are on the shelf on the left. Cyan first, then red, then purple. Then press on the secret door that appears.
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