Fetish aspects aside, overall a fun experience, I could definitely see these mechanics being in a "normal" fangame without fetish aspects. I also threw together a little review of each of the girls and how hard I found it to deal with each one.
Milkamean: very aggressive, but probably wont kill you. she takes up the hallways so she might actually help. 1/10 difficulty
Suki: same as Milkamean
Paranoia: very annoying, especially when the screen shakes. 4/10
Helltaker (Cruxia): Unlike in actual Freddy's games, pulling up your camera doesn't make you any more vulnerable, so she ends up being a minor annoyance, and is extremely predictable. 2/10
Hana: rarely shows up and can be countered even once she gets past the door. 3/10
Elina: again, just an annoyance, the worst part is how she prevents you from checking the doors. 4/10
Dragon girl (forgot her name): consumes a lot of your time keeping her happy, 5/10
Achira: Stays at the door for a very long time, but wont kill you immediately. 5/10
Cindy: Very predictable, very loud, wastes almost no power. 2/10
Crystal: Hard to hear, can move from the vent into a kill very quickly. 7/10
Emily: Same as Crystal, but can also attack from either door and cannot be stopped after she gets through. Very aggressive. 9/10
Nougat: mildly aggressive, but can't be stopped once she gets past the door. Makes a lot of sound. 6/10