It's impressivly challanging and fun, I actually find this game really nice and it really seems it was done with love, which I really apreciate

If it helps, i have some ideas here that I've though about while playing 

1. -The donut could be in an other room, there are already 3 easter eggs in the main office (while 2 end the night) so it is a bit full 
2. -The voice lines are a  bit too quiet through the night, the setting of changing the voice lines'  audio to one's liking could be pretty neat! (Or the game's audio at that)
3. -edited: The cubes under the table could spell "cum" instead of die, nice flumpy refference
4. -edited:  If Chica and Freddy are in the Supply Closet, they can interact on very rare occasions 

that's kinda it! If I have more ideas I'll  edit this - you'll probably not see my edits, so why not, I'll have some fun with them; 

All the love!