> ## Documentation Index
> Fetch the complete documentation index at: https://docs.turntable.games/llms.txt
> Use this file to discover all available pages before exploring further.

# The game document contract

> What a valid Turntable game is.

A Turntable game is **one complete, self-contained HTML document**, served
inside a sandboxed WebView in the Turntable app.

## Requirements

* **All CSS and JS inline.** No external resources, no network requests
  (other than what the injected SDK makes on your behalf), no imports.
* **Mobile portrait, touch-first**: large tap targets, one-thumb play.
  Include the viewport meta tag and disable text selection/tap-highlight on
  interactive elements:
  ```html theme={null}
  <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
  ```
* **Instantly playable**: understandable within 2 seconds. Show a one-line
  instruction on screen. No menus or splash screens.
* **Dark background** (the feed is dark), bold readable text, generous
  spacing.
* **Short rounds** (5–60 seconds), immediately restartable by tapping.
* **No** `alert`/`confirm`/`prompt`, no console spam, **no `localStorage`**
  (it isn't durable in the app — use
  [`Turntable.saveState`](/sdk/reference#persistent-state) instead).
* **Plain ES5-compatible JavaScript** is safest. Keep the document under
  \~40KB.
* **Never define `window.Turntable` yourself** — the platform injects it
  before your code runs.

## The sandbox and security model

Your game document receives a **short-lived, game-scoped token** — not the
player's session. It can only reach SDK endpoints for your own game. It can
never act on the player's account, approve purchases, or read other games'
data. Purchase confirmations happen in native UI outside your document
entirely — see [Economy](/sdk/economy).

## Manifest settings

* `requiresAccount` — restrict your game to signed-in players. Enforced
  server-side (the document is never served to guests) and surfaced in the
  feed as "🔒 Sign in to play". Use it when your game depends on identity
  features that are meaningless for guests.