I built a game where you guess the AI prompt behind images
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:
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
Its so good and addicting!! loved it
I'm really glad you liked it! Thank you!
Nice
Really nice UI!
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!
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!
Thanks, Irtiza - really appreciate that! And yeah, the semantic scoring approach makes so much more sense than keyword matching. Prompts are about ideas, not exact words. Getting that "closeness" right is a fascinating problem, almost like building a tiny search engine for meaning.
The educational angle is a happy accident, but it's also what makes it sticky. People will keep playing because they're learning without realizing it.
Glad the 2-minute race mode landed, sometimes constraints create the best kind of pressure.
If you ever want to bounce ideas about the scoring algorithm, happy to lend an ear. Always love chatting with fellow builders.
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
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!
nice. good idea
Thanks!!
Wow let me try my luck😄
Were you successful? :D
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?
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!
That’s great to hear and honestly you’re already thinking about the right part of the experience.
From working with a few founders on product demos and launch visuals, I’ve noticed that the “reveal moment” is often where engagement spikes. When players see how close they were in a quick visual way (side-by-side prompts, animated reveal, score impact, etc.), it turns the result into a small reward moment rather than just feedback.
For games like Promptle, those moments also tend to be the most shareable parts, which can help with organic traction.
If you want, I’d be happy to put together a quick visual concept for how that reveal sequence could look for your game.
Is it going to be free forever?
Keep it going!
Solid idea I like the concept 😅
Fun game. I've tried but didn't pass the first image...
Haha, no worries! A new puzzle after every 24 hrs so you can try again :D
One of the best activities i have seen using AI
Thanks!
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!
Interesting concept speed is a huge advantage for founders.
One thing I’ve noticed from watching a lot of early launches is that a landing page becomes far more effective when visitors can understand the product in seconds, not just read about it. Founders often underestimate how much a quick visual explanation or demo can increase engagement.
For a builder like ReactLaunch, having something that helps founders show the product instantly (not just describe it) could make it much more powerful.
Curious are most of your users launching MVPs or more established products?
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!
The goal is to turn prompt engineering into an engaging, gamified experience that makes mastering the skill feel like playing rather than studying lol.
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.
This means alot! Thanks
That's so cool!
Thanks!!
This is awesome!!
Thank you so much!
This is a genuinely fun concept — reversing the usual prompt-to-image flow makes for a surprisingly tricky challenge. The PvP mode is a smart addition. Time pressure completely changes the dynamic and adds replayability that a solo mode alone wouldn't have. Curious how you're scoring the guesses — is it keyword matching, semantic similarity, or something else? That scoring logic seems like it could make or break the experience.
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.”