For anyone that has problems beating the game here some tips:

1 night: Basically your only problem is chica, bonnie and puppet, so all you want to do is just look left - right-left- right for like 5 seconds, then pickup camera and windup music box, then do it all over again, if you scared you can get jumped when using camera, you can just close the doors when you pickup the camera it would not end the charge of your battery enough for you to lose due to blackout.

2 night: All of up above but now we have circus baby and foxy(also mangle can appear) so with addition to above now you'd need to look at foxy camera too, when she will be seen only as an eye in the shadow, you have like 15 sec to 1 min she will appear from left corridor like other games, you can hear her footsteps when she's running, but ull have like 3 seconds to react, so you better be gud OR you can completely cheese this by closing left door completely after 1 am(better to do it once she in her pre-run state, but you can manage like this too) bonnie will also be cut off, so youll only problems now are puppet and chica as well as cirus baby(warning!) this little fuck doll will break ur fucking doors if you not flash that bitch on the face and u basically dead, so when you pickup camera there will be distortion when she appears(more than usual) you need To react fast, and flash on her for 3 seconds i believe, she can be any of 3 acces points to ur office, she cant appear behind locked doors.

Factory: this where it gets interesting, factory is EASY if you have good headphones or hearing at least. So up to "character_whatever 2" you can go absolutely uninterrupted, because circus baby will not be even 1/3 fast of how she will be during last steps. Then you go flash this bitch(also she has 3 stages before attacking you, all with sound cue, so when you hear her move 3 times you have to shock her, she will also not move if you flash on her) once you shocked her go and restore power(always do that after you shocked her even if it was once), then you can do activate ballora, and after that prepare to be nominee from music school, since now you need to hear exactly when she is near your office, or else if you close door too soon, well you dead. Basically all steps after activating ballora:

If CB is 2 or 3 stage shock CB - restore power - wait for ballora - close the door - flash on CB so she wont move - ballora leaves - open ne noor- if CB on 2 or 3 stage shock her - if you low on power restore - complete any task(listen still however) then complete all steps since first step all over again. The last task is shutdown system, you could not complete it if circus baby was shocked more than 3 seconds before you started completion. 

Night 3: all from night 2 with mangle and slightly increased speed, now you need to also listen to mangle she will make factory cb sound when she in the vent you need to close the vent(easy right). You can also see her approach on the camera but its pointless and just wastes your time with music box winding up.(She will not move when you look at her, but if your doors are broken from cb, you will die anyway) Also cb will now appear  more frequently so be sure to flash her in time. You can also cheese again with cutting off foxy and bonnie, but now do it after 3 am since power draining is more and you also have 1 more door to close. If foxy runs before 3 am you have to wait for her to run, then open the door(she will run 2 - 3 times during night) after 3 time you can just open door and only close if bonnie.

this is so much to read 

idk if i wanna read allat