 Balcrum's level zero is actually way deeper than you thought it was. That's right, there's actually several sub-levels to the famous yellow walled expanse, and some of them are worse than others. Take the red rooms, for example. This level looks like the regular zero, except it's got a red corrosive hue to it, or the very air itself is dangerous. There are strange creatures that roam the halls, and once you get here, you cannot escape and you're trapped. What about level 0.5? The chaotic structure. This sub-level has a bluish fog-type hue to it, with strange shapes to float around. The air and ambience here is corrosive as well, and it's home to an entity called QWERTY that lurks in the fog and hunts wanderers down who come here. That's just two of the sub-levels of level 0. There's like 20 more. Let me know if you want to see more.