Hi !
I don't understand if there is a fighting mecanic or if you're meant to flea ? I managed to open one chest and I liked the hint.
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As the Devil mentions in the beginning, this world is made of memories, so everything that happens in this world has figuratively already happened. There's no actual way to lose, and the hearts are a red-herring. Keep exploring, some of the items you find will help you find other items, and if you find them all, you might be able to see your mommy again ;) Sorry for the confusion.