Spongerooms, part 2. You walk the same yellow corridor carved out of an infinite Menger sponge, past an ivory and ebony yin-yang. At the second intersection the floor is missing. You stop at the edge, look down, and step off. A new level of corridors passes every second as you fall, and space bends harder the deeper you go.
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Tap the picture to pause. Skip to the drop jumps to the edge of the pit. Drag Curvature to change how hard space bends, and lower Detail if it runs slowly on your device.