謎解き - 私の夏休み - 夏の思い出 is an Android game developed by Jammsworks. It is a free game in the Games category. The game consists of solving 10 questions for each diary entry. By successfully solving a rearrangement puzzle, you can proceed to the next diary entry and its set of questions. The game features a total of 50 or more questions, with increasing difficulty as you progress.

When you successfully answer a question, you will receive a "keyword" and "points". Points can be used to unlock hints, while keywords are necessary to find the next diary entry. If you are stuck on a question, you can make use of hints or share the question to seek help from others. If all else fails, there is a "give up" button to reveal the answer.

Please note that depending on the device, there may be issues with recognizing answers. In such cases, try using different character types like "kanji," "hiragana," or "katakana."

The game features sound effects from Maou Damashii.