404 Runner

A minimalist, high-speed browser runner inspired by the Chrome offline dino. Built as a single-page canvas game with crisp monochrome visuals, responsive controls, and progressive difficulty.

Highlights

• Instant start: Space, click, or tap
• Jump, duck, dodge with AABB collisions
• Speed and spawn rate ramp as you score
• Day/night cycle with reduced-motion support
• Local highscore persistence
• Sound effects with toggle
• Desktop + mobile friendly

Controls

• Jump: Space / ArrowUp / Tap
• Duck: ArrowDown (hold) / Swipe down
• Pause: P
• Restart: Space or R (after Game Over)

Tech

• HTML + CSS + Vanilla JS
• Canvas rendering
• requestAnimationFrame + delta time physics
• localStorage for highscores

Run locally

Open index.html in a browser. For a local server, run one of these:

python -m http.server 8080

npx serve .

Then visit http://localhost:8080.

Accessibility

• Reduced motion toggle in the footer
• Respects prefers-reduced-motion on first load

Project structure

• index.html UI shell and overlays
• styles.css layout, typography, and visual direction
• app.js game loop, physics, and input handling

License

MIT