The torture tag is doing a lot of heavy lifting here, and honestly, it's the wrong kind of torture. It's not some expertly crafted BDSM mechanic. It's the torture of pixel hunting at 60fps in a browser tab while my CPU fan doesn't even bother to spin up. The whole thing runs on what feels like a single thread of JavaScript, which is fine I guess, no shader compilation stutter to whine about.
There's a hentai picture, a copy of that picture, and the game asks you to spot the difference. The xmas theme means the character is a busty elf or something wrapped in ribbon, jingle bells strategically placed. Standard stuff. On my first run, I clicked a shadow on a bauble that didn't exist in the second frame and got a flash of red. The "punishment" loop kicked in, which is just a gif playing in a div with the opacity cranked up, showing the character getting tangled in Christmas lights. The art style is that specific type of slightly off-model where the eyes aren't looking at the same thing. It's hot in a way that active disdain for the medium makes it hotter? I don't know. Actually, the coloring is flat and the lines have that awful aliased stair-step effect you get from scaling a bitmap without bilinear filtering, so no, it's not hot. It's a mess.
Modding community for this? Non-existent. Nobody is out there building a SKSE script extender for an HTML5 spot the difference game. The real player creativity is in the endurance to stare at two nearly identical jpegs of crystal dildo decorations. I spent maybe four minutes looking for the last difference on the third stage. It was a single miscolored pixel on a candy cane stripe. That's not game design, that's a cry for help. Satisfying click though, I'll give it that. There's no depth buffer to mess up, so the hitbox for clicking the difference is tight. Latency is zero because it's local. I respect that technical clarity, even when the content is unpolished smut.