Love the printable layout! It works really well without colors, love it. I actually prefer it personally to the screen version, it's so pretty– though the screen version does work beautifully in full screen.
The screen version seems to have weirdly too high contrast for me? Or the pure white letters end up being relatively so bright they are actually a bit hard to read. This may be screen-dependent, on less bright screens contrast is a good thing. But still an awesome addition to have both versions.
The map being embedded between the two columns works really well here, stylish! Also liking the background, it's not
Flow-wise, is three different encounters a bit on the low side, if I'm reading correctly an encounter is rolled for each room? Also vent oxygen seems really punishing, capable of ending the adventure early quick. But actually playing this might show otherwise. Of course code red provides three more? Maybe it's fine, hard to say without running it.
I really like the rooms and the loop, it's an effective flow, good stuff. I also enjoy the idea of roleplaying the code red escalation, along the lines of "Please don't touch the key card, or else."