Pretty good for a 9-day game. Wish there was more of it. If you are going to continue it, here are some of my suggestions:
1: Pony Carriage. A mechanic where the character has to pull a large object via a harness.
2: Electrocution Tiles/Objects. A mechanic where if you step on an object, you get shocked. Or you have to put on an object that shocks you to get through a puzzle.
3: Self-pumping dildo/toys. It might be a bit difficult to animate, but it would be fun to have. Can be used to hold a "key-like object." Like, the dildo acts as a key for a door or something.
4: Bondage traps. Let's say there are traps that you must dodge, and if you get hit by them, then they screw you for a select period of time.
5: Punishment Puzzles. Where you have to go into a machine to get spanked/whipped/tickled a set amount of times to solve a puzzle.
6: Cosmetic bdsm wear.
7: An edging orgasm denial mechanism.
8: Another bdsm mechanic that forces you to crawl on the ground under obstacles.
9: A mechanic where you need to suck/get penetrated by an object from a glory hole, and have to carry the liquid from one location to another.
And so on.