here are some dumb ideas i have gotten for the game.
a math teacher that will give math question and you need to solve them before the night ends
a pillow like entity and when it enters into your room it will not end the run but will make you tired meter go faster
a dog that is in your room at the begining and want bellyrubs sometimes but if dont give him bellyrub he will start barking and make the other enemies go faster to you.
a plush character that will be needed to be pushed back by slaming the door on its head
a mini game that could happen after beating a night in story mode. you need to place ice into Slik the slimes tub to cool him off while not making too cold or too hot and it will. If it happens he will get you and you gotta hide away for Sona so she cant find you and eat you.
another minigame idea. You need to make repairs for Sona's stomach but while not waking her fully up. she will randomly half awake and when she is just dont move and she'll go back to sleep
when your in custom night the icons should change when you increase the difficulty like they starting to look more hungry and drolling