PromptMatch is a competitive image-prompting game. You get a target image, write a prompt, and compare your generated result with a scoring system based on content, color, and structure similarity. It started as a fun duel project and evolved into a practical way to improve prompt engineering through daily challenges, timed runs, and unlimited play.
Built PromptMatch as a fun game to compete with my girlfriend, and it unexpectedly became a great way to improve image prompt writing.
How it works:
- You see a target image
- You write a prompt to recreate it
- You get a score based on how close your generated image is
The score combines:
- Content similarity - compared using CLIP (neural-net) embeddings
- Color similarity - HSV histogram
- Structure similarity - a lightweight HOG-style layout comparison
Game modes:
- Unlimited
- Time limit
- Daily challenge (free, once per day)
What I’m trying to build:
- A simple, replayable product where people can both have fun and gradually get better at prompt quality.
I’d love feedback on:
- First impression of the game loop
- Whether scoring feels fair/useful
- What would make you come back daily
Try it: https://promptmatch.app
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