Very cool! I like the subtle world building with stuff like "cave creature" and "robotic security" it makes me feel like I'm exploring a small part of a greater world.
The ending having a guaranteed some people are dead is a nice touch of realism that would definitely hit hard in game.
Readability was a bit tough as the backgrounds and words clashed. I do enjoy the backgrounds, but something like coloured boxes around the text would certainly help with eye strain.
I dig the changes to successes being 3+ instead of 4+, it fits thematically and makes the game feel a more rewarding.
Overall pretty cool! Well done and keep it up :D