I really like the combination of the mundane horror of the workplace and spooky monster horror. Celia having to deal with all sorts of microaggression and corporate terribleness felt very real and you did a great job creating an atmosphere of stress and uncertainty in a place where nobody really respects you.
I hope you'll be able to make an extended post-jam version since I see a lot of potential with this premise. I'm definitely intrigued with what I've seen and keen to learn more about Celia and her circumstances.