Braindom is a fun game but the levels can get pretty tricky. Here we have the answer for "Solve the mysteries!" in Braindom Level 288. 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
1. Shine the light around the top center of the black square.
2. Turn on the switch.
3. Use the key to unlock the chest.
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