Palm Kart

Drift, boost and race three animal rivals round three tropical island circuits to win the Palm Cup.

Three.js4 build stagesComplete game available

Make it yours ↓Play full game ↗

Local build pack · No model call starts on this page

THE GAME LOOP

A small idea worth finishing.

Auto-accelerating karts with grip, a hold-to-drift slide that charges blue then orange sparks, and a matching boost on release
Ordered checkpoint arches and distance-based positions; sand slows, water and wrong-way reset you just behind
Three karts with real tradeoffs (speed, pickup, grip, off-road) and three rivals with racing lines and small mistakes

THE LOOK & FEEL

A world with its own personality.

Original animal drivers in chunky karts: a raccoon in goggles, a toucan, a turtle and a capybara in their own liveries
Three dioramas built from the circuit data: sand causeway and islands, warehouses and cranes, cliff wall and sea stacks
Kerbs, bunting arches, a start gantry with lights, chevron boards and a cheering grandstand mark the racing line

MADE FOR THUMBS

Plan the phone experience first.

Steer pads bottom-left, Drift and Brake bottom-right, all 48px+ in safe areas; the kart drives itself and the road ahead stays clear of HUD and thumbs.

The playbook requests H5 layouts and input. Real-device playtesting is still part of the build.

01 / MAKE IT YOURS

Same spark. Your world.

Change a few details. The brief and every build stage update together.

Your main characterYour worldWhat the player wants to achieveA personal touch Optional

02 / YOUR BUILD PLAYBOOKThree.js direction

Create an original kart racer as one self-contained browser game in Three.js (WebGL2). The player is a raccoon driver in round aviator goggles racing on a lagoon causeway with a palm bridge, a walled harbor and a cliff-top road. Goal: finish every 2-lap race on the podium and win the cup.

Karts accelerate on their own; the player steers, brakes and holds Drift while turning to slide, charging blue then orange sparks that fire a matching boost on release. Build each circuit from straights and arcs with real tight corners. Ten ordered checkpoint arches per lap: skipping or reversing never counts, positions come from real distance, and a hard time cap ends stalled races. Sand slows you; water, walls and facing the wrong way put you back on the road just behind.

Three karts with measurable tradeoffs and three rivals that follow racing lines with light catch-up and small mistakes. A three-race cup scores 10/6/3/1 with fair tie-breaks; 4th place means retry. Add a time trial with medals, a short training lap, three difficulties, pause with settings, results and a podium.

The full pack adds the H5 controls, build contract and acceptance checks.

Copying, downloading and customizing are free. No build starts here.

Read the full local build pack

# Palm Kart — SiGameGen original game brief

Prompt template, not a prebuilt game. Engine direction: Three.js.

## Project brief

Create an original kart racer as one self-contained browser game in Three.js (WebGL2). The player is a raccoon driver in round aviator goggles racing on a lagoon causeway with a palm bridge, a walled harbor and a cliff-top road. Goal: finish every 2-lap race on the podium and win the cup.

Karts accelerate on their own; the player steers, brakes and holds Drift while turning to slide, charging blue then orange sparks that fire a matching boost on release. Build each circuit from straights and arcs with real tight corners. Ten ordered checkpoint arches per lap: skipping or reversing never counts, positions come from real distance, and a hard time cap ends stalled races. Sand slows you; water, walls and facing the wrong way put you back on the road just behind.

Three karts with measurable tradeoffs and three rivals that follow racing lines with light catch-up and small mistakes. A three-race cup scores 10/6/3/1 with fair tie-breaks; 4th place means retry. Add a time trial with medals, a short training lap, three difficulties, pause with settings, results and a podium.

## Local build contract

Work in a new isolated project directory through my signed-in local Claude Code subscription. Do not call a separate model/image API, change provider settings, use an API gateway or spend on a paid service. Do not deploy, publish, commit or push without an explicit follow-up instruction. Read applicable repository instructions first.
Build a complete browser game with the full campaign and progression in the project brief. Keep the rules-first stage as development work, then finish the art, game feel and release review before calling the game complete. Include an interactive skippable tutorial, distinct data-driven levels or missions, meaningful progression, fair failure and chapter retry, a final ending, settings and replay. Pin locally installed dependencies; bundle code, engine, fonts and assets into a self-contained HTML. Use original procedural art or supplied assets with permission and keep a licence inventory. Separate deterministic rules, input, renderer, UI, audio and scene data.
SiGameGen embed contract: opaque-origin iframe, no runtime CDN/imports, fetch/XHR/WebSocket, browser storage, popups or page navigation. Keyboard and touch must work without pointer lock on phones. Emit only integer points: parent.postMessage({type:'sigamegen:game-event',version:1,event:'started',score:0}, '*') once per run, and the same schema with event:'game_over' and the final score once at win/loss. Points are not money.
Save campaign checkpoints through the host only. Request {type:'sigamegen:save-request',version:1,gameId:'<game-id>'}; accept {type:'sigamegen:save-state',version:1,gameId,state,storage:'available'|'unavailable'} only from window.parent. Validate your actual save schema, own-key IDs and ranges. Post {type:'sigamegen:save',version:1,gameId,state} with a small plain JSON state (<=8192 UTF-8 bytes); state:null explicitly clears it. Show saved only after {type:'sigamegen:save-status',version:1,gameId,status:'saved'|'cleared'|'unavailable'|'invalid'} from the parent. Failed or missing acknowledgements must stay honest and allow retry; missing storage must not block play. Local progress and scores never authorize money or rewards.
Audio is off until opt-in. Support volume, reduced motion, safe areas, controls at least 48px, portrait/landscape camera fit, pointercancel, pause/restart confirmation, tab hide and return without fast-forward. Tutorial hints must leave the action visible, and primary actions must fit short landscape screens. Stop rendering while paused, hidden and on results; cap particles/enemies and mobile DPR at 1.5. Target <=1.6MB raw / 400KB gzip; measure the actual result, not a promise. Test actual game fairness, legal-input progression, loss/retry and save validation; then review the full campaign, upgrades, ending and replay in the real sandbox at 320x568, 393x852, 852x393 and desktop. Keep inspection bots and debug controls out of release builds. Report passed checks and untested device/audio paths separately.

## Continue in the same Claude Code project

### 1. Core mechanics

Build deterministic fixed-step rules first with greybox karts for a raccoon driver in round aviator goggles on a lagoon causeway with a palm bridge, a walled harbor and a cliff-top road: circuits from straight and arc segments, ordered gates, distance ranking, drift charge and boost, pads, sand, water and wall recovery, wrong-way reset, rival racing lines and the cup, so a player can finish every 2-lap race on the podium and win the cup. Test that gates only count in order and forwards, a shortcut never ranks you ahead, ties break the same way for player and rivals, and an input-only bot podiums every race while idle and careless driving lose.

### 2. Art pass

Art pass: model a raccoon driver in round aviator goggles and three animal rivals from primitives in distinct karts with steering, spinning tyres and drift lean. Build a lagoon causeway with a palm bridge, a walled harbor and a cliff-top road from the circuit data so what you see matches what you drive: road, kerbs, sand or grass verges, water or walls, a palm bridge, warehouses and cranes, cliff faces and sea stacks, islands, palms that sway, a grandstand crowd and bunting arches. Keep solid props beyond the drivable edge and keep a licence note.

### 3. Game feel

Make every race toward finish every 2-lap race on the podium and win the cup readable: a chase camera that swings into drifts and sits higher in portrait, spark colours for each charge stage, boost flames and a brief zoom that reduced motion removes, sand spray, splash and wall bumps, a countdown with gantry lights, position, lap, time, a minimap and a drift meter. Add opt-in surf music, an engine pitched by speed and a training lap whose lessons need real steering, a real drift, a boost and a recovery.

### 4. Review & ship

Review a raccoon driver in round aviator goggles on a lagoon causeway with a palm bridge, a walled harbor and a cliff-top road as a release candidate at 320x568, 393x852, 852x393, 852x345 and desktop: controls 48px+ including touch brake, the kart and the road 25 to 45 metres ahead clear of controls, HUD and the training card, every menu reachable. Clear inputs on blur, pointercancel, pause and hide. Validate saves with own-key ids, show saved only after the host confirms, and ship one offline HTML without dev tools and with one started and one game_over per run.

## Acceptance checks

- Gates count only in order and forwards; a teleport or shortcut never advances the lap or the ranking.
- An input-only expert bot finishes in the top 3 on every circuit, kart and difficulty; idle play always finishes 4th.
- Cup ties break by points, count-back and the latest race identically for player and rivals, and survive save and resume.
- Full steer into a bend with Drift held reaches blue sparks before leaving the road on every circuit with every kart.

## Research references

These are design references, not included code or assets. The prompts are original SiGameGen briefs. Model attribution in external repositories is creator-reported.

- Turbo Kart Rally · BridgeMind: https://github.com/bridge-mind/turbo-kart-rally
  Creator documents a shared architecture contract, drifting, procedural art and race presentation. Our original complete game has three circuits, three karts, three animal rivals, a points championship, time trials and H5 steering, drift and brake controls. Its cover uses the normal gameplay chase camera.
- Turbo Kart Rally showcase: https://x.com/bridgemindai/status/2102451997395866021
  Original showcase link located from the public demo index. The GitHub report is the evidence used here; this X video could not be loaded for review this session.

Want a quick 2D sketch first?

The online builder adapts these mechanics to Canvas 2D. The full Three.js version is built in your local Claude Code project.

Open a 2D sketch ↗Opening the builder is free. Only confirming Build game uses platform credits.

DONE MEANS PLAYABLE

The checks this game should pass.

Gates count only in order and forwards; a teleport or shortcut never advances the lap or the ranking.
An input-only expert bot finishes in the top 3 on every circuit, kart and difficulty; idle play always finishes 4th.
Cup ties break by points, count-back and the latest race identically for player and rivals, and survive save and resume.
Full steer into a bend with Drift held reaches blue sparks before leaving the road on every circuit with every kart.

These are requirements for your future build, not results already verified for this prompt.

RESEARCH, WITH CREDIT

What shaped this playbook.

Original SiGameGen prompts authored in our local Claude Code subscription session. References inform the design; their code, assets and prompts are not bundled. External model attribution is creator-reported.

GitHub

Turbo Kart Rally · BridgeMind ↗

Creator documents a shared architecture contract, drifting, procedural art and race presentation. Our original complete game has three circuits, three karts, three animal rivals, a points championship, time trials and H5 steering, drift and brake controls. Its cover uses the normal gameplay chase camera.

Turbo Kart Rally showcase ↗

Original showcase link located from the public demo index. The GitHub report is the evidence used here; this X video could not be loaded for review this session.