Hi Product Hunt,
I’m Wayne, the maker behind PlayMerge.ai — a code review game I vibe coded to help developers sharpen their merge instincts in under 5 minutes a day. Also, as a Convex.dev demo app.
Here’s what PlayMerge does:
PlayMerge gives you real pull request diffs from real codebases. Some were approved by humans. Others were AI-generated. Your job? Decide whether you’d merge or reject — and see how your instincts stack up.
It’s fast, fun, and a surprisingly addictive way to train your eye for clean, safe code. Great for:
• Developers who want to practice reviewing code across stacks
• Teams running internal challenges or code quality tournaments
• Engineers prepping for technical interviews
Why I built it
Code review is one of the most important—and under-practiced—parts of being a developer. I wanted to learn to build more apps through vibe coding with Convex and make a fun game for developers to play.. Just click, read, decide, and learn.
What’s new with the launch
• New languages added: Java, C++, SQL, and Go
• Scoreboards and difficulty tiers are live
• Snippets are now AI- and human-authored so you never know what’s coming
I'm excited to see how the developer community uses PlayMerge. Whether you’re a junior dev looking to improve fast, or a senior engineer who wants a daily puzzle.
I would love to hear your feedback. Thanks for checking this out.
– Wayne, Head of Community and Startup Programs at Convex
Convex