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“Miegakure is a platform game where you explore the fourth dimension to solve puzzles. Because humans can only see and move along three spatial dimensions, pressing a button allows to ‘swap’ one regular dimension with the fourth, invisible dimension. Armed with this, the protagonist can see inside closed objects, walk through walls, move objects from one dimension to another, hide under 3D shadows of 4D objects…” This is incredibly cool, but also makes my brain hurt.