This is a super cool atmosphere. The thing is, it's really hard to make progress when every mistake sends you back to the beginning of the game. It would be really cool if instead, you get sent back to the beginning of the last room you entered. I'm also just slightly confused because at the beginning of the game, it seems like we're a detective, but then the security guard doesn't want us to be there investigating? Maybe I misunderstood, but that part of the story could use a little clarity.
Everything else is top notch though. All the little notes between co-workers do a great job of world building. I want to get to the bottom of this story!