Howdy! I love the game so far. My only complaint is night 5's difficulty spike. I managed to beat night 4 in a handful of attempts, but I've been trying night 5 for days now and havent made it past 4am. The withered animatronics keep lining up right outside my door and come in one at a time, eating up around 3-5 seconds where I'm completely powerless each time. When combined with BB, Mangle, Foxy, and the music box, it's near impossible. That doesn't even touch on Toy Freddy's mechanic, because so far in all my attempts he's shown up maybe five times. 

Night 5 needs some serious re-balancing in my opinion, but unlike most of the other comments I don't think Foxy is the main issue. He's just probably the one people die to most often because he's the only one without an audio cue. (Unless that high-pitched ringing I sometimes hear is his audio cue, in which case it's just being drowned out.) I think all of the Withered animatronics just need a bit of tweaking to give the player the tiniest bit more breathing room between them coming into the office. Enough time to check Foxy and the music box maybe, instead of having to pick one or the other every time.