Are other people in the elevator operated by other actual users online, or are they randomly generated? Honestly, it's indistinguishable from random.
Are you supposed to be "conversing" with the other thought bubbles that appear? Using the 10 phrases you're allowed to use, which because they're meaningless you cannot tell whether someone is actually responding to your input or just a bot putting up phrases?
The sentiment is nice, but I have to say, 4 weeks to build this seems... unfortunate.