---
title: Neuron Runner
emoji: 🧠
colorFrom: blue
colorTo: purple
sdk: static
pinned: false
license: mit
short_description: RL neural net learns a platformer in real time
---

# Neuron Runner

**By [cahlen](https://huggingface.co/cahlen)** | [GitHub](https://github.com/cahlen/neuron-runner)

A neural network learns to play a 2D platformer in real time, entirely in the browser.

- **CoFrNet** (default) — continued-fraction network ([Puri et al., NeurIPS 2021](https://arxiv.org/html/2506.05586)): parallel ladders of nested fractions with a dedicated ladder-rung visualization and feature-attribution panel
- **MLP** — classic two-layer perceptron with live node-and-edge activation visualization
- **REINFORCE** policy-gradient training, running live via TensorFlow.js (WebGPU / CPU)
- Three.js Mario-themed game renderer