js-runner

Endless runner game — vanilla JavaScript, Canvas 2D, zero dependencies

Play

Open index.html in a browser (needs a local server for ES modules):

npx serve .

Or visit kvrvgixzis.github.io/js-runner

Controls

• Space / Arrow Up — jump (hold for higher jump)
• Tap / Click the button or canvas on mobile
• Variable jump height: tap = small hop, hold = full jump

Features

• Variable-height jump (Mario-style)
• Progressive difficulty
• High score saved locally
• Gravity reverse easter egg every 20 points
• Touch support for mobile
• Delta-time physics (frame-rate independent)

Structure

src/
├── main.js       — game loop, state machine, init
├── config.js     — all constants in one place
├── state.js      — GameState class with reset()
├── input.js      — keyboard, mouse, touch input
├── physics.js    — gravity, variable jump, collisions
├── entities.js   — obstacles, tiles
└── renderer.js   — all drawing functions