I know this is really a tweaked and expanded copy of my actual review, but i wanted to say more and better. I came here expecting just expecting an NSFW visual novel like any other one. But i got so much more than that. I got a game that touched my heart deep and make me genuinely cry. If this game was completely absent of sexual themes (which it kinda is as of now) it wouldn't even make a difference. The storytelling in this is insane. It genuinely made me feel sad on the 5th night, anger at William when Puppet-san told her story, a genuine connection to the animatronics, and true friendship with them, as well as Roger, and extremely excited on the day i went back to the place. It's by far the best FNiA game (i believe), the best mature FNaF game, and maybe even the best mature game out of all i've ever played. And to think it's still in alpha... a great game, one with a beautiful story, while i believe some parts could be called "cliché" it's not like anything i have seen all strung together. It's truly a geat game. The artwork, which IIRC is done by one or two people, is great. The way the clothes suit them all so well is great, considering FNiA has the characters just... naked. Well, the clothes are great for characters that aren't Goldy-san and Springy-chan, since they seem to not have any actually. Every character has their own set of expressions that easily differentiate their personalities. Freddy is stubborn and doesn't like sharing emotions; Bonnie is jumpy and gets excited for the littlest of things; Chica is caring and supportive, calm; Foxy is reckless and has a smaller filter than the rest; Mangle is shy and calm, always trying to help; BB loves taking care of and watching over everyone, especially young children; Puppet is very calm and collected, not very social but a great listener; Goldy is generally just a good person, really chill and always up to do something with somone if it makes them happy; and Springy is generally cheerful and loves hugs. A lot. Every character is very different, and they're all just great people you'd want to be around. The way the protagonist's life turns around due to a stroke of luck, and finally gets everything he could've ever wished for in life, after 20 years of suffering, is great storytelling. The way everything lines up together nicely. He gets a random job that he could only work five nights for, but gets good pay (and then gets extended to forever), he repairs the old animatronics due to having been a mechanic, and having just the tools to do so, he gets an old animatronic performing again with some pretty colours, he brings an entire room back for the repaired animatronics to perform in, he kills the guy who tormented the animatronics for a long, long time and most importantly, he gets the friends he always wanted. The family he always wanted. The love he always wanted. And there's intercourse (or more like implied intercourse) too i guess. But the main plot wouldn't even suffer if it was removed. Overall, just a great all-round visual novel.
TL;DR: I absolutely LOVE the storytelling.