I liked the idea, and as a standalone game it's enough as is. This could also serve as the intro to a game in this setting though.
The ending is nice, but it's not as an impactful of an "oh shit" moment as it could be. I was instead confused about why this happened, and the log in the UI felt a bit cheap. I know it was foreshadowed, but would be nice if I cut myself off just from the logic of the puzzle I'm in, rather than something external. Like if I was entirely responsible for the ending and should have seen it coming if I were smarter.
That being said, if this is the intended intro to a longer game, and the goal is to fix the situation, that's fine I don't mind it, and it's a good way to introduce a unique danger to the game.
Technically the game ran fine, but I had a hard time setting the resolution to be the correct value in-browser so I just played on the default settings