 Are there sub-levels of level run for your life? Yeah, obviously. There's actually a negative version of the level. It has a similar layout, but it takes the appearance of a blue tinted hospital hallway rather than the red of the parent level. Level negative run for your life has randomly segmented staircases and rooms throughout. And unlike the main level, this level's safe with no entities that wanna eat your face off. There are supplies and everything like that located inside the hospital rooms themselves that you can stock up on. But the only problem is any of the doors in these blue hallways can open back to level exclamation mark. So you always have a random chance of being sent back. Let me know in the comments if it's worth it to explore here. I also have a full video explaining the level if you wanna check that out for some reason.