Hey Product Hunt 👋 I'm Prakash — full-stack engineer by day, solo indie dev by night. Loop is my latest side project. What inspired it: LinkedIn's "Zip" puzzle blew up this year. The mechanic behind it — a Hamiltonian path, where you draw one continuous line through every numbered cell in order — is genuinely great puzzle design, and I didn't think anyone had built a dedicated, polished mobile game purely around it. So I built one. The problem I was solving was mostly for myself: I wanted a puzzle I could open for 60 seconds and get one clean, satisfying "click" moment — no ads breaking flow, no bloated meta-systems on top of a simple idea. How it evolved: I started with a basic grid generator and spent most of the time tuning difficulty curves and making sure every puzzle has exactly one valid solution — that part turned out to be the hardest engineering problem, harder than the UI. Where I'm at: live on Google Play, free to play, zero ad budget — growing this through ASO, Reddit, and communities like this one. No revenue yet, still learning what's worth charging for. Play Store: https://play.google.com/store/ap... Would love feedback — especially from anyone who's played Zip or similar loop puzzles. Does the core mechanic feel complete as a standalone game, or does it need more modes to hold up?

Loop - Number Puzzle Game

Draw one path, hit every number — inspired by Zip

Draw one path, hit every number — inspired by Zip