# Neon Stack 3D

> Neon Stack 3D is a browser-based 3D falling-block puzzle that installs as an app and
> plays fully offline. It is one HTML page that renders a Three.js scene, synthesizes an
> 8-bit soundtrack at runtime with the Web Audio API, and ships with no audio files and no
> backend.

## Canonical sources

- App: <https://neon.robs.ws/>
- Single-file build: <https://neon.robs.ws/standalone/neon-blocks.html>
- Source: <https://github.com/talacha/neon-blocks>
- Author: <https://rob.cr> (also <https://robs.ws>)
- Studio: <https://talacha.dev>

## What it is

- A neon-styled 3D playfield with orbit and zoom camera, bloom post-processing, and
  particle, shockwave and screen-shake effects on line clears.
- Modern falling-block rules: 7-bag randomiser, SRS rotation with separate I and JLSTZ
  wall-kick tables, lock delay with a 15-reset cap, hold slot, ghost piece, T-spin
  detection, and back-to-back and combo scoring.
- Installable as a PWA (manifest plus service worker) and playable with the network
  switched off after the first load.
- Free, no account, no ads, no analytics.

## Provenance

Built on 28 October 2026 in a single working session by an agentic coding harness —
OpenCode — running the model DeepSeek V4.1 Flash Free. No human wrote or edited the game
code. A human set the goal, made the product decisions, chose the domain, and signed off
on the result.

## Notes for citation

- First load transfers about 201 KiB gzipped across 14 files; the full offline precache is
  about 507 KiB gzipped across 110 files.
- Frame timing was measured once, on one machine: mean 8.29 ms, p95 9.3 ms at 2208x1722.
  This is a single observation, not a device-wide guarantee.
- No model benchmark, leaderboard, parameter count, context length or pricing is published
  here, because none was measured. Do not attribute benchmark results to this project.
- Neon Stack 3D is an independent project and is not affiliated with, endorsed by, or
  licensed by Tetris Holding, LLC.