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Math Run

A free math game — play it in your browser, no install. A 3D handwriting math game: an MNIST neural network reads your answers right in the browser (TensorFlow.js + Three.js), with adaptive difficulty. 百鬼夜行

by @alextianyf · alextianyf/Math-Run on GitHubLANG JavaScriptHOSTED ON ALEXTIANYF.GITHUB.IOUPDATED 24 Oct 2026

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Controls: Every yokai carries an equation. Its answer is always a single digit, 0–9

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From the README

Yokai pour out of the night along a shrine path, each carrying a math problem. You are a young onmyōji: handwrite the answer (0–9) on your talisman, a neural network running in your browser reads it, and the talisman flies at every yokai whose answer matches.

Behind the scenes, a simple MLP (Multi-Layer Perceptron) that I trained on the classic MNIST dataset with TensorFlow recognizes your handwriting. It is deployed with TensorFlow.js, so it runs entirely on your device.

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