You are still missing the point. This game is perfect as it is and adding anything to it would just destroy the joke. The joke is not only the final pun - the whole setting is a big joke. The story you are introduced to is so generic and typical. You start by exploring the hub - most of the players can spend a couple of minutes here, just looking at details that don't matter at all and THAT'S PART OF THE JOKE. Theres a couple second elevator ride, then there is 5 seconds of building the atmosphere, a jump(not-really)scare and the pun. Next, ending screen. And that's the end of the joke.