LEVEL 0.67: "THE LOBBY WENT COLD"

After finding a vent in Level 0, you entered it, and began crawling through it, thinking it could be a way to escape this level.

However, after a bit of crawling, you eventually fell out of the vent, onto the floor. Upon taking a look at your surroundings, it seemed just like Level 0, except...the walls were shifting and reorientating themselves haphazardly...

You had just entered Level 0.67. This one is quite the tough sublevel...

Good luck.