Like the idea. Feel like the execution is kinda meh (though fair enough for a first try, just getting something out is good). Just wanted to leave some suggestions I thought of:
1. show the results!
Don't just tell me the percentage, tell me exactly which I got right. Preferably right after the question instead of at the end. Most importantly show me proof that the model is or isn't trans. A second pic of video where they are fully nude would make the game actually interesting.
2. Order the pics in categories of difficulty.
Without the results I can't be sure, but some questions felt very hard, while others felt obvious. Maybe a tier system/challenge would be fun. Ordering them so you get 4 similar pics would also be better. Getting 1 nude, 1 fully clothed, 1 topless and 1 headshot is kinda bs.
3. Add some story/dialogue.
Instead of just a quiz, you could lean into a corruption/sissification/whatever fetish. Maybe give rewards of normal porn and punishment of fetish porn.
I feel like this game would be better served as a mini-game in a sissification story than as a standalone game. I think that could be really fun actually. But even as a standalone game it could be improved.