I was later annoyed that Night 1 had absolutely nothing happen. It was only buildup to get you used to the new mechanics for Night 2 and onward. However I will confess that I was scared out of my wits expecting something. The charm of the game comes from how the gameplay is so different from the others that it leaves you unsure what to do and possibly freak out when Springtrap gets close.
By Night 5, I figured out how to easily beat the game (although it has a fair chance of failing). My strategy was bringing Springtrap to the very back room (CAM10, I think), close the vent connected to it and play the audio whenever he stepped into CAM9 to lure him back to CAM10. This is unlikely to work the whole night but you can keep him at bay long enough (unless you get a vent error and he decides to go to the left vent and slips through it 0.2 seconds before you shut it off, the fucker). That's the big flaw of this game. It's really easy if you know what causes the errors in your defenses and keep him corralled in the back. But I can't say I felt my money was wasted for a game I beat so quick. It was fun getting scared just from trying to get used to the game.
But I don't want to call the game disappointing .The game is goddamn terrifying. I love how the cameras are really hard to examine and how Springtrap has about two different poses in each camera which can catch you off guard if you think he stays in one place of the shot. The game's variety in methods to stop Springtrap as well as his strategies was really nice to see. Having to reboot the building always gave me the sense of dread, more than whenever I had to wind the box in FNAF2. The Phantom animatronics scared me bad. Phantom Mangle (I assume because of the body and the godawful noise it makes) made me scream out loud. The fact Springtrap and Phantom Freddy visibly moved around was fucking eerie. Springtrap's jumpscare I got used to quite quickly but I love how disgusting he looks.
As for the game's plot, it was odd to see how straightforward it was. I actually predicted the twist that the Purple Man was Springtrap (only because the Phone Guy's calls clued me in) but I was still surprised to see it play out. The game feels like the conclusion of the series but I'll have to beat Night 6 to see if there's even a hint of a FNAF4. Although I won't be surprised if Scott does make a FNAF4. This series is his tugboat. I'm glad that FNAF3 was quite different but it felt only half right (I didn't like it being so easy). It was just enough to keep the cashcow from falling into mediocrity. If he puts more time, money and love into another one, I'll likely still buy it. But one thing I want out of a FNAF4 is all of the animatronics being animated. Walking, crawling and not standing still to smile for the camera. Would make it a whole lot scarier if he dumps their 'Red Light, Green Light' routine.
Also after dying on Night 6 for the umpteenth time, I got a freeze image of Springtrap's mask off, showing Purple Man's horrifying corpse. I'm not going to sleep tonight.