Man, looking through the comments, with all this talk of hidden tapes and ways to interact with the girls, I'm starting to think ya'll are talking about a completely different game.
There are no collectibles of any sort scattered around on any nights, and the only "scenes" are game overs from letting them into the room. Nothing ACTUALLY happens otherwise, and I don't know why everyone is talking like there's tons more to the game. Did some update neuter it? Also it's called First Nights on the main menu, so I'm starting to think the main download isn't actually the full game everyone is talking about.