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lantern sums

A free browser game — play it in your browser, no install. A small browser game built from scratch with Claude Code, with its prompts and cards

by @NMar33 · NMar33/lantern-sums on GitHubLANG JavaScriptHOSTED ON NMAR33.GITHUB.IOUPDATED 26 Oct 2026

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Best with a keyboard. Controls: Space · Mouse

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From the README

A small browser game built from scratch with Claude Code, as an example of how to do it. It goes with the video Build a Browser Game from Scratch with Claude Code and Slightly Parallel.

Lanterns rise with numbers on them. Click the ones that add up to 10 before they fly away. Miss three and the game is over.

The work was planned and tracked with Slightly Parallel: six cards on a Kanban board, handed to two Claude Code sessions working at the same time.

Each card's file holds its text as it was pasted into Claude Code. The git history has one commit per card.

Read the full README on GitHub →

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