The game has been in the works for a while, and right from the beginning, the game seemed crazy, since it allows you to cram all 50 characters into a single game. This includes Baby, Freddy, Foxy, Springtrap, Phone guy...yes, everyone. And you can set all of them to 20. At the same time. Scott, the creator of the game, says he only survives for about 15 seconds on 50/20 mode.
On the surface, the game does not seem to contain any story, nor any elements related to the story, however, some people have already gotten some random cut scenes and rare images faintly appearing after they loose. It would be very unusual for Scott NOT to include a bunch of Easter eggs hidden here and there.
A few days ago, Scott released a "demo" version of the game. It featured the same menu / start screen, but it was just a troll game.
The game is completely free on Steam now.