A fast, juicy 3D endless-runner that lives in a single HTML file. Swim a coral canyon, dodge urchins, mines, jellyfish and moray eels, chain pearls into combos, and chase your best score across five biomes — from sunlit reefs to the boss escape.
Play it: just open index.html in any modern browser (desktop or mobile).
No build step, no install.
| Action | Keyboard | Touch |
|---|---|---|
| Change lane | ← → or A / D | Swipe left / right |
| Jump (hold to charge) | Space | Tap & hold |
| Dive-slam | ↓ or S (mid-air) | Swipe down |
| Pause | P or Esc | ⏸ button |
A fully-charged jump triggers the Rainbow Boost. The dive-slam sends out a shockwave that pulls in nearby pearls.
- Winding canyon — the world bends into curves and cascade drops ahead of you (vertex-shader world bend, so lane controls stay pixel-exact)
- 5 biomes with smooth colour-graded transitions, animated caustics, god rays, sand cascades pouring off the canyon ledges, and a procedural sunken temple that drifts by
- Power-ups: shield 🛡, magnet 🧲, and 2× score ✨
- Skill rewards: near-miss bonuses ("CLOSE!"), combo multiplier, pearl arcs over obstacles
- One revive per run, slow-motion last-life moments, distance milestones, live NEW BEST chase
- Procedural audio — all SFX and the adaptive music loop are synthesized with the Web Audio API; the tempo rises with each biome. No audio files.
- Local top-5 high scores (browser localStorage only — nothing leaves your device)
- three.js r128 from CDN, pinned with Subresource Integrity (SRI) hashes and a
fallback CDN; a strict
Content-Security-Policymeta tag limits scripts to those hosts - No analytics, no cookies, no network calls besides the CDN libraries and Google Fonts
- Unhandled startup errors are rendered with
textContent(no HTML injection) - WebGL with 2K soft shadows, ACES tone mapping and a post-processing chain: Unreal-style bloom → custom underwater refraction & chromatic aberration shader → FXAA (falls back to plain rendering automatically if the add-ons fail to load)