Sadly, though this game has great foundations, this was a very frustrating experience. First, the settings option on the menu was way too hidden and the keycards are hardly visible. Now, speaking of the first actual FNAF segment, did you play it at least once, the bare minimum?
1. It doesn't save before the segment.
2. The sounds are extremely hard to hear.
3. Whilst the concept of Fredina's mechanic is good, in execution it gives an insanely small time to react, especially because of the animation for placing the battery.
4. The computer screen at the center of the room gets very often misaligned with my view, and the X gets hidden, so I've got no choice but to die.
5. The terminal is functionally similar to The Marionette, THE primary example of what not to do in a FNAF fan game. Instead of mindlessly holding without gameplay, there could be some sort of minigame, or anything else to spice it up.
I'm sorry if I appear to be too critical, but criticism is necessary to improve a game such as this. I hope you will improve upon your game.