I realized I made the document a bit too vague and open to interpretation on some stuff, maybe I got caught in the weird vibe too.
The idea at the core is to explore this rise of position of the protagonist in the office.
I went with the idea of a card game for gameplay because I tought it mached the sillyness of the setting; so as gameplay you would probably have to challenge your colleagues to rise to higher floors and reach the "boss"; there is also some exploration that could be done like small subquests like office chores that could lead to some strange puzzles, they could reward the player with cards or some king of advantage while playing cards. To get a more clear idea I would probably have to create the entire card system...