Accessibility Statement | NEAT Lunar Lander Playground

1. Commitment to Accessibility

We are committed to ensuring digital accessibility for people of all abilities. We continually improve the user experience for everyone and apply the relevant accessibility standards, including the Web Content Accessibility Guidelines (WCAG) 2.1 and 2.2 Level AA, the Americans with Disabilities Act (ADA) Title III, Section 508 of the Rehabilitation Act, and the European Accessibility Act (Directive 2019/882).

2. Summary of Implemented Accessibility Measures

To ensure robust accessibility across graphical simulations and complex neural network data, the following features are actively implemented:

Keyboard Navigation & Control: Every interactive element—including presets, genetic mutation triggers, simulation buttons, display checkboxes, modals, and the simulation viewports—is operable via keyboard without requiring a mouse.
Manual Keyboard Piloting: Users who cannot use pointer drag gestures can manually pilot the Lunar Lander using standard Arrow keys (Up, Left, Right) or WASD keys.
Bypass Skip Link: A high-contrast skip link is positioned at the top of the DOM, enabling screen reader and keyboard users to immediately bypass repetitive header controls and reach the main flight deck.
Visible Focus Indicators: High-contrast focus rings (:focus-visible) ensure unambiguous visual feedback when navigating via keyboard.
Accessible Graphics & Fallback Content:
- The HTML5 <canvas> physics simulation has an explicit role="img", an aria-label, and structured semantic fallback text for screen readers.
- The D3.js neural network <svg> includes accessible <title> and <desc> elements and can be zoomed (+/-/0) and panned via keyboard.
Telemetry ARIA Semantics: Live telemetry values utilize appropriate ARIA roles (progressbar for fuel, meter for touchdown radar, and status live regions for thruster lights and flight status).
Color Contrast Compliance: Color palettes across text, buttons, HUD gauges, and status badges meet or exceed WCAG Level AA minimum contrast ratios (4.5:1 for standard text, 3:1 for large text and non-text user interface components).
Reduced Motion Support: The application honors the operating system prefers-reduced-motion: reduce setting, disabling pulsing animations and violent screen shakes.

3. Keyboard Shortcuts Reference

Primary Keyboard Shortcuts for Simulation & Visualization
Key	Action	Scope
`Space`	Pause / Resume physics simulation	Global
`↑` / `W`	Fire main thruster (manual piloting)	Global / Canvas
`←` / `A`	Fire left RCS thruster (rotate right)	Global / Canvas
`→` / `D`	Fire right RCS thruster (rotate left)	Global / Canvas
`R`	Reset lander to starting altitude	Global
`T`	Generate new lunar surface terrain	Global
`G`	Toggle wind / atmospheric turbulence	Global
`E`	Trigger Auto-Evolve for 5 generations	Global
`F`	Fit view / Reset network topology zoom & pan	Global
`+` / `-`	Zoom in / zoom out topology network graph	Graph focused
`0`	Reset graph zoom & pan to center	Graph focused
`Arrow Keys`	Pan graph up, down, left, right	Graph focused
`?`	Open Keyboard Shortcuts help modal	Global
`Esc`	Close any open modal dialog and return focus	Modal active

4. Compatibility with Assistive Technologies

The application is designed to be compatible with:

Modern web browsers: Chrome, Edge, Firefox, and Safari on desktop and mobile operating systems.
Screen reader software: NVDA, JAWS, Windows Narrator, Apple VoiceOver, and Android TalkBack.
Screen magnification and browser zoom up to 200% without loss of content or function.
Speech recognition software and switch access devices.

5. Feedback & Accessibility Assistance

We welcome your feedback on the accessibility of the NEAT Lunar Lander Playground. If you encounter accessibility barriers, require alternative documentation formats, or have suggestions for improvement, please submit an issue on our public GitHub repository. We aim to respond to feedback promptly.