A 10–15 minute 3D action-adventure demo. You are the marsh's smallest — and bravest — guardian: a pink axolotl on a quest to cleanse the wetland of dark crystal corruption.

Just double-click index.html — it runs offline in any modern browser (Chrome, Edge, Firefox, Safari). No build step, no server needed. Click the canvas to capture the mouse; press ESC to release it / pause.

🎮 Gamepad supported: left stick swim, right stick look, A jump, B dash, X whip, Y whirlpool, LB shield, RT charge blast, RB hat, R3 lock-on, Select map, Start pause.

Progress saves automatically at every milestone — CONTINUE appears on the title screen. After freeing the Crystal Catfish King, ride his back for a victory lap! Dive underwater for light shafts and muffled dreamy sound, watch for fish schools, dragonflies, birds and log-snails, shooting stars at night, and a rainbow when the crystal-rain clears.

Sunlit Marsh → Giant Lily Forest → Moss Ruins / Crystal Caverns → the Sunken Temple. Collect glowing spirit pearls from corrupted creatures to break the gates between regions — each gate unlocks a new water ability and fully heals you. At the temple, face the Crystal Catfish King in a three-phase battle... and free him, don't destroy him.

Every enemy flashes a red ! the instant it commits to an attack — watch, then counter. Exploiting a weakness lands a golden crit; damage numbers and health bars show what's working:

• 🦀 Crystal crabs — crack the shell first (blasts work fast; whirlpool flips them)
• 🌿 Thorn vines — they rattle before striking; water blasts sever them in two hits
• 🐸 Shadow frogs — hit them mid-puff to stun; their spores can be reflected with the shield
• ✨ Insect swarms — one whirlpool scatters the whole cloud
• 🐢 Snapping turtles — armored up front: dodge the charge, strike the tail, or blast the open jaw
• ⚡ Electric eels — untouchable while sparking; strike in the calm between charges
• 🍄 Mud goblins — they steal pearls and run! Chase them down for interest

• 🐣 3 lost baby axolotls (they'll follow you home)
• 🏺 3 ancient relics
• 👒 4 cosmetics in treasure chests
• ⚔️ A challenge cave ambush in the eastern marsh
• Dynamic day/night, drifting crystal-rain storms, and fireflies after dark

Plain JavaScript + Three.js (vendored in vendor/), procedural WebAudio sound & music — zero dependencies, no build step, no server needed.

Rendering (js/post.js, js/gfx.js, js/world.js, js/grass.js)

• HDR pipeline: MSAA half-float scene target → dual-kawase bloom → ACES filmic tone mapping, color grade, vignette, dithering; underwater wobble, hurt aberration, slow-mo grade.
• Water: a depth/refraction prepass feeds a shader with true thickness-based absorption, refraction, fresnel sky reflection, HDR sun glints, contact + shoreline foam, rain ripples, a wake around the axolotl, and Snell's window when you look up from below.
• A global material patch adds animated caustics to everything underwater and a fresnel rim light to characters; terrain gets slope rock, wet shorelines and rippled sand.
• ~60k GPU grass blades + wildflowers in a camera-following field (heights baked into a half-float texture), with wind gusts and grass that parts around you.
• Analytic sky with a blooming sun disc, layered distant hills, a forested rim, soft light beams, and per-zone atmosphere (dim glowing Crystal Caverns, a brooding temple that brightens once cleansed).

Audio (js/audio.js): lookahead-scheduled generative music with per-zone chord progressions and phrase-based motifs, synthesized percussion for the boss, convolution reverb, a master compressor, and marsh / underwater / cavern ambience beds.

Models: all 39 models (player, enemies, boss, vegetation, architecture, pickups, hats) are authored in Blender by the scripts in blender/, exported as GLB with vertex colors (with Cycles-baked ambient occlusion multiplied in), and embedded as base64 in js/assets-data.js so the game still runs from a double-clicked index.html — no fetches, no CORS. A tiny custom GLB parser (js/assets.js) instantiates them as named node hierarchies that the gameplay code animates directly (gills, claws, whiskers, jaws...).