TRTF Recoded was originally made to be a faithful remake of the original with no gameplay changes, just fixing the bugs, but overtime it received some extra touches like visual transitions, fancy custom menu, etc. The game has a polished framework and it felt like a waste that it was all going towards a gameplay where you do nothing except stare and put on the mask. I couldn't figure out how to approach the notion of new mechanics - a new game mode? A separate game? It didn't click with me. And besides I wanted to keep the core of the game. But recently I figured it out - there'll be Extra menu challenges which make some of the animatronics act in new ways, and the Extra menu will be unlocked after night 1 so new players won't have to wait for the new mechanic options for too long. There mechanics will not go towards main menu star requirement as to not make players feel pressured to indulge with them. Once enabled, they'll be applicable everywhere including custom night.

If you have any mechanic ideas, be sure to let me know! I might consider them