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A Black Yoshi's Test Room 3 - v1.51
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A Black Yoshi's Science Lab
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Description
You must climb a very vertical room in order to get to the exit. You must use momentum, but it seems that the builders forgot to place some white tiles on the ceiling of this vertical room. All Aperture's cash flow has been spent into the building of this test room.

v1.51 - Fixed a design flaw which allowed to skip a part of the map