I love the premise of this game! I think we can all relate to not wanting to talk to a chatty coworker without having some caffeine in us. I really enjoyed the progression from level 1>2. Level 3 was a bit much. I think if you're going to have multiple Chatty Cathys that they should look different. You could even add some backstory like maybe she comes from a talkative family and she brought them to work, of maybe even a catty friend gave her a ride. If you wanted, you could even expand to the different types of coworkers that are having to endure it, get into office politics like people that just want to come in and do their job, the ones that are competitive, etc,.. There are so many dynamics you could delve into to advance your game even more! I would definitely update the level 3 to be different coworkers that are chatty, or have maybe one friend she brings in (her ride or something) to up the difficulty (like over pouring your coffee- that was brilliant!). But multiple versions of the same coworker didn't only up the difficulty, it felt a little empty. Love the janitor, too! I've had to be a janitor and headphones are your best friend for these types of people. But you should definitely start integrating more coworkers!

Keep up the good work!