Really challenging
Looks simple to play, but hard to solve, real brain teaser.
Yes, 輪廓:彎曲的拼圖 is completely free and it doesn't have any in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
輪廓:彎曲的拼圖 is free.
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Looks simple to play, but hard to solve, real brain teaser.