I built a game where you guess the AI prompt behind images

I built a game where you guess the AI prompt behind images - Indie Hackers 28 Likes 1 Bookmark 32 Comments Hey Indie Hackers! I recently built Promptle, a game where you try to guess the hidden AI prompt behind an image. You see an AI generated image and must figure out what prompt created it. The closer your guess, the more points you earn. I also added a PvP mode where two players race to guess the prompt in 2 minutes. Would love feedback from the community! Try it here: https://www.promptle.online Irtiza Hammad posted to Promptle - AI Prompt Guessing Game 28 1 Share Say something nice to irtizahammad… Post Comment 2 The scoring problem you mentioned is really interesting. Semantic similarity works for free-text guesses, but prompts aren't just bags of words. A prompt like "cyberpunk cityscape at sunset, neon lights, rain" has distinct components: subject, style, lighting, atmosphere. Two guesses can match on meaning but miss on structure entirely. That's something I keep running into from the opposite direction. I'm building flompt, an open-source visual prompt builder where you decompose prompts into typed blocks (role, constraints, output format, etc.) and compile them to XML. The core idea is that prompts have internal structure that matters. For Promptle, you could potentially score along those dimensions separately. "Got the subject right but missed the style" is way more useful feedback than a single similarity score. It would also teach players faster because they'd learn which prompt components they're weak at. The PvP timer is a smart move. Competitive pressure forces you to think about what matters most in a prompt, which is basically prompt engineering in disguise. Open-source if you're curious: https://github.com/Nyrok/flompt Hamza Konte · 2 hours ago · Reply · Edit 2 Its so good and addicting!! loved it sudesh · 4 hours ago · Reply · Edit 1 I'm really glad you liked it! Thank you! Irtiza Hammad · 4 hours ago · Reply · Edit 2 Nice mhafeez · 5 hours ago · Reply · Edit 2 Really nice UI! ZXZ · 5 hours ago · Reply · Edit 2 This is such a clever concept, Irtiza. The idea of making people reverse-engineer the prompt is not just fun, it's actually educational , you start to understand how prompt phrasing affects output. The PvP mode sounds like chaos in the best way. Quick question: how are you scoring "closeness" for the guesses? Is it based on keyword matching, semantic similarity, or something else? That feels like the trickiest part to get right. I'm building in a similar space but different angle , FontPreview.online helps designers test fonts with their own text, check licenses, and analyze brand personality. Different problem, same builder energy. The 2-minute race mode is genius. That kind of time pressure makes it addictive. Congrats on the launch , will definitely try it out! Muhammad Afsar Khan · 10 hours ago · Reply · Edit 1 Thank you, I really appreciate that! Yeah, the educational side of it was actually something I realized while building it. When you try to guess the prompt, you start noticing how small wording changes can affect the image a lot. For scoring, it’s not strict keyword matching. It’s more about how close the meaning of the guess is to the original prompt. So if someone phrases the same idea differently, it can still score well. I’m still tweaking that part though, because getting “closeness” right is definitely the hardest part. FontPreview.online sounds cool by the way. Always nice to see other builders working on tools that solve real problems. And glad you liked the 2-minute race mode! Irtiza Hammad · 4 hours ago · Reply · Edit 2 why is this so addictive..... :) Just one thing... in pvp, once I have entered my word and it matches the cursor (text) moves away from the text box.. I have to reclick the text box so that I can start typing again... Great Idea, amazing execution.. keep up the amazing work aaic · 12 hours ago · Reply · Edit 2 Thanks for pointing that out! That definitely sounds like a small focus bug in the PvP input. It should stay active so you can keep typing without clicking again. I'll take a look and fix it. Really appreciate the feedback . Also, really glad you're enjoying it, haha! Irtiza Hammad · 11 hours ago · Reply · Edit 2 nice. good idea wilko_indindango · 12 hours ago · Reply · Edit 1 Thanks!! Irtiza Hammad · 11 hours ago · Reply · Edit 2 Wow let me try my luck😄 Muhammad Aliyu Tukur · 13 hours ago · Reply · Edit 1 Were you successful? :D Irtiza Hammad · 11 hours ago · Reply · Edit 2 Cool idea the concept is instantly intriguing. The PvP mode is especially smart because it adds urgency and competition, which can make it much more engaging. One thing I was wondering while checking it out: games like this often become even more addictive when the moment of discovery is really clear and exciting for the player especially when they see how close their guess was compared to the actual prompt. Curious have you experimented with showing that reveal moment in a more visual or dramatic way? David_Young · 18 hours ago · Reply · Edit 1 Thanks, I really appreciate the thoughtful feedback! You’re absolutely right about the reveal moment. Right now players do get to see the actual prompt after the round, but I agree that making that moment feel more exciting could make the experience much more satisfying, especially when someone was really close. I like the idea of making the comparison between the player’s guess and the real prompt more visual so people instantly see how close they were. Definitely something I’ll experiment with. Really great suggestion, thanks for taking the time to share it! Irtiza Hammad · 11 hours ago · Reply · Edit 2 Is it going to be free forever? Vytrenis · 19 hours ago · Reply · Edit 2 Keep it going! mardoh · 20 hours ago · Reply · Edit 2 Solid idea I like the concept 😅 Mario 🦎 · 21 hours ago · Reply · Edit 2 Fun game. I've tried but didn't pass the first image... Marc · a day ago · Reply · Edit 1 Haha, no worries! A new puzzle after every 24 hrs so you can try again :D Irtiza Hammad · 11 hours ago · Reply · Edit 2 One of the best activities i have seen using AI Waqaswadi · a day ago · Reply · Edit 1 Thanks! Irtiza Hammad · a day ago · Reply · Edit 2 Hey Indie Hackers! We recently built ReactLaunch a tool that lets founders launch fully functional landing pages in just 72 hours . I’d love to hear from other founders: what features would make a landing page builder truly indispensable for you? Any feedback, big or small, is super valuable. Thanks in advance! Robson Muniz · a day ago · Reply · Edit 2 Oooooo that was actually so fun and innovative!! This can be a great learning experience for people who are beginners at prompting and learn in a fun way how AI works. Incredible that it’s totally AI made! Minotaur6 · a day ago · Reply · Edit 1 The goal is to turn prompt engineering into an engaging, gamified experience that makes mastering the skill feel like playing rather than studying lol. Irtiza Hammad · a day ago · Reply · Edit 2 Must say that this is an absolutely amazing game. When you play it, you can really feel how much creative thinking has gone into it and how intelligently its features have been designed. What makes it even cooler is the challenge feature and the satisfaction of earning Elo. Kudos to Irtiza. JokerShaikh · a day ago · Reply · Edit 1 This means alot! Thanks Irtiza Hammad · a day ago · Reply · Edit 2 That's so cool! brano · a day ago · Reply · Edit 1 Thanks!! Irtiza Hammad · a day ago · Reply · Edit 2 This is awesome!! pakihakerman · a day ago · Reply · Edit 1 Thank you so much! Irtiza Hammad · a day ago · Reply · Edit 1 Have you ever felt like your company is doing well but people still don’t take you seriously yet? I’m starting to think perception plays a much bigger role in founder success than we admit.” themarogee · 16 hours ago · Reply · Edit