Gravi Hop | HTML5 Ball Jumping Game with 1000 Levels

Gravi Hop — 2D HTML5 Canvas Platformer

Version: v1.0.0
Type: Standalone HTML5 Canvas game — runs in the browser

Description

Gravi Hop is a 2D side-scrolling platformer built entirely with HTML5 Canvas, blending classic platformer gameplay with modern mechanics. The player journeys through 1000 procedurally generated levels. The game features a dual-currency economy (coins + diamonds), a purchasable cosmetics system (balls, menu backgrounds, game backgrounds), full multi-language support for 11 languages including Arabic, and integrated sound effects.

Key Features

• 1000 procedurally generated levels via a seeded RNG (deterministic layouts)
• Varied obstacles: electric walls, ground gaps, animated obstacles, spikes, lasers, stepping stones
• Dual-currency economy: coins + diamonds with an in-game currency shop
• Full cosmetics system: 10 purchasable balls + 10 menu backgrounds + 10 game backgrounds
• Gallery for previewing and equipping owned cosmetics
• 11-language support: Arabic, English, French, Spanish, German, Italian, Portuguese, Russian, Turkish, Chinese, Japanese
• Sound effects: 5 WAV files (jump, coin, start, game-over, click)
• Multi-input controls: keyboard (arrows + space) + on-screen touch buttons
• Auto-save: all progress stored in localStorage (settings, coins, level, cosmetics)
• Orientation lock (portrait) via screen.orientation.lock() with CSS overlay fallback

Browser Requirements

• Chrome 49+ / Firefox 45+ / Safari 10+ / Edge 14+ / Opera 36+ (all released in 2016)
• Older browsers display a friendly “please update” message instead of failing silently
• Not supported: Internet Explorer

Package Contents

How to Run

1. Extract the archive
2. Open game/index.html in any modern browser
3. Play immediately — no server or installation required

Customization

All constants in script.js (inside the GAME_CONFIG object) are tunable: player speed, gravity, coin rates, level count, cosmetic prices, and more. The bundled documentation explains every customizable value.

© 2026 Gravi Hop — v1.0.0