Microcosm is the 134th level in Chip's Challenge Level Pack 2. As noted by the hint, the center square is a "map" of the major features in the other 24 cells of Microcosm: hidden fire at coordinate [3, 3] in this room means there is some hidden fire in coordinate [3, 3] of the 5x5 subgrid; the green key at [1, 1] means there's green locks in it; etcetera. While Tyrethali Ansrath made Microcosm, this "map grid" type of level was later copied by other designers, including Eric Schmidt.