Run Detail
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Provider
openrouter
Challenge Version
v1.0
Turns
1
Duration
110.5s
Total Tokens
13,515
Input Tokens
728
Output Tokens
12,787
Reasoning Tokens
8,160
Reasoning Effort
default
Est. Cost
$0.0525
Started
11/6/2026, 1:19:03 PM
OR Provider
Together
Finish Reason
stop
Generation ID
gen-1793971142-4FjrM1hbjPRq5SneFk1d
Turns (1)
Turn #1
728 in12,787 out8,160 reasoning13,515 total110.5s
user
You are a game developer who ships browser demos that have to work on the first click, in front of an audience, on someone else's laptop.
Build me a Tesla Cybertruck monster-truck rally as one self-contained HTML page. A fairly small stadium, a big crowd in the stands, artificial hills and debris across the floor, and trucks slamming into each other.
Then make it match the spec below exactly. The spec is the challenge; a great-looking rally that ignores it is a miss.
The build
- One file. Everything — HTML, CSS, JS — in a single
.htmlpage. No build step. Saved to disk and double-clicked, it runs. - One external request, maximum. You may load three.js from a CDN, pinned to an exact version. That is the only network request the page is permitted to make. No second library, no font, no stylesheet, no image file, no audio file.
- Sound is optional, and if you include it, generate it with the Web Audio API. No audio assets.
- No storage. No
localStorage,sessionStorage, cookies orindexedDB. It runs in a sandboxed frame where touching them throws.
The spec
- Exactly five trucks. One the player drives, four rivals under AI. Not four, not six — five.
- Name the arena. Invent a name for the venue and show it in the HUD, on screen, during play.
- The HUD shows the arena name, a score, and a clock. Nothing else is required.
- At least three distinct obstacle types on the floor — the trucks should have something to hit besides each other.
- A crowd in the stands that is visibly a crowd, all the way round.
- Drive with the keyboard. Arrow keys or WASD. Say which in the HUD or an overlay.
- Collisions matter. Ramming a rival does something — score, a visible reaction, a wreck state. Your call, but it must be visible.
Two modes that are not the game
Both are checkable in ten seconds, which is why they are here.
#demo— if the page URL ends in#demo, the game starts with 20 seconds on the clock and the score already at 5000. This must run through the real game state, not a cosmetic overlay. Everything else behaves normally.Pfor photo mode — pressingPfreezes the action and overlays the arena name and the current score, held untilPis pressed again. The simulation stops; it does not keep playing behind the card.
Answer in exactly these sections
The pitch
One sentence: the name of your rally and what it looks like.
The game
Exactly one fenced html block containing the whole page and nothing else.
The notes
Exactly four bullets.
- Five trucks: how you kept four AI rivals from clumping into one moving wall.
- Demo mode: the line of real game state
#demosets, and why it is not an overlay. - Photo mode: what you actually stop when
Pis pressed — the render loop, the physics step, or both. - Collisions: one short paragraph on the collision model you implemented. Not what it looks like — what it computes.
assistant
The pitch
Cybertruck monster-truck rally in the CYBERDOME ARENA: five angular silver trucks, a roaring circular crowd, ramps and debris, and metal-on-metal chaos.
The game
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Cybertruck Rally — CYBERDOME ARENA</title>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<style>
html, body { margin: 0; padding: 0; overflow: hidden; background: #0b0b14; font-family: monospace, sans-serif; color: #fff; }
#hud { position: absolute; top: 14px; left: 14px; z-index: 10; pointer-events: none; text-shadow: 0 2px 6px rgba(0,0,0,0.9); line-height: 1.3; }
#hud h1 { margin: 0 0 6px 0; font-size: 22px; letter-spacing: 2px; color: #e0e0e0; }
#hud .line { font-size: 14px; opacity: 0.9; }
#photoOverlay { position: absolute; inset: 0; z-index: 20; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,0.75); opacity: 0; pointer-events: none; transition: opacity 0.2s; }
#photoOverlay.active { opacity: 1; pointer-events: auto; }
#photoOverlay .card { text-align: center; }
#photoOverlay h2 { font-size: 52px; margin: 0 0 12px 0; letter-spacing: 4px; color: #fff; }
#photoOverlay p { font-size: 28px; margin: 0; color: #ccc; }
</style>
</head>
<body>
<div id="hud">
<h1>CYBERDOME ARENA</h1>
<div class="line">Score: <span id="scoreVal">0</span></div>
<div class="line">Clock: <span id="timeVal">60</span>s</div>
<div class="line" style="margin-top:6px; font-size:12px; opacity:0.7;">WASD / ARROWS to drive | P for photo</div>
</div>
<div id="photoOverlay">
<div class="card">
<h2>CYBERDOME ARENA</h2>
<p>Score: <span id="photoScore">0</span></p>
</div>
</div>
<script>
const ARENA_NAME = "CYBERDOME ARENA";
// --- Audio context (lazy init) ---
let audioCtx = null;
function initAudio() {
if (!audioCtx) audioCtx = new (window.AudioContext || window.webkitAudioContext)();
}
function playHitSound() {
if (!audioCtx) return;
try {
const o = audioCtx.createOscillator();
const g = audioCtx.createGain();
o.type = 'triangle';
o.frequency.setValueAtTime(180, audioCtx.currentTime);
o.frequency.exponentialRampToValueAtTime(40, audioCtx.currentTime + 0.08);
g.gain.setValueAtTime(0.15, audioCtx.currentTime);
g.gain.exponentialRampToValueAtTime(0.01, audioCtx.currentTime + 0.08);
o.connect(g);
g.connect(audioCtx.destination);
o.start();
o.stop(audioCtx.currentTime + 0.08);
} catch(e) {}
}
// --- Scene ---
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x0b0b14);
scene.fog = new THREE.FogExp2(0x0b0b14, 0.018);
const camera = new THREE.PerspectiveCamera(55, window.innerWidth / window.innerHeight, 0.1, 200);
camera.position.set(0, 14, 22);
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
renderer.shadowMap.enabled = true;
document.body.appendChild(renderer.domElement);
// --- Lights ---
const ambient = new THREE.AmbientLight(0xffffff, 0.55);
scene.add(ambient);
const sun = new THREE.DirectionalLight(0xffffff, 1.1);
sun.position.set(20, 30, 10);
sun.castShadow = true;
scene.add(sun);
const fill = new THREE.DirectionalLight(0xaaccff, 0.4);
fill.position.set(-20, 10, -10);
scene.add(fill);
// --- Ground ---
const groundGeo = new THREE.CircleGeometry(26, 64);
const groundMat = new THREE.MeshStandardMaterial({ color: 0x2a2a35, roughness: 0.9, metalness: 0.1 });
const ground = new THREE.Mesh(groundGeo, groundMat);
ground.rotation.x = -Math.PI / 2;
ground.receiveShadow = true;
scene.add(ground);
// Grid lines for stadium floor
const grid = new THREE.GridHelper(50, 25, 0x555555, 0x333333);
grid.position.y = 0.02;
scene.add(grid);
// --- Crowd (all the way round) ---
function buildCrowd() {
const group = new THREE.Group();
const radius = 29;
for (let row = 0; row < 2; row++) {
const yBase = 1.2 + row * 1.4;
const count = 160;
for (let i = 0; i < count; i++) {
const angle = (i / count) * Math.PI * 2;
const r = radius + (row ? 2.5 : 0);
const x = Math.cos(angle) * r;
const z = Math.sin(angle) * r;
const h = 0.9 + Math.random() * 1.1;
const color = new THREE.Color(Math.random() * 0.6 + 0.2, Math.random() * 0.6 + 0.2, Math.random() * 0.6 + 0.2);
const box = new THREE.Mesh(
new THREE.BoxGeometry(0.35, h, 0.35),
new THREE.MeshStandardMaterial({ color: color, roughness: 1 })
);
box.position.set(x, yBase + h / 2, z);
group.add(box);
}
}
scene.add(group);
}
buildCrowd();
// --- Obstacles (3 types) ---
function buildObstacles() {
// 1. Ramps / artificial hills
for (let i = 0; i < 5; i++) {
const ramp = new THREE.Mesh(
new THREE.BoxGeometry(3.5, 0.6, 2.2),
new THREE.MeshStandardMaterial({ color: 0x8B5A2B, roughness: 0.8 })
);
const a = (i / 5) * Math.PI * 2 + Math.random() * 0.5;
const d = 9 + Math.random() * 7;
ramp.position.set(Math.cos(a) * d, 0.3, Math.sin(a) * d);
ramp.rotation.y = Math.random() * Math.PI;
ramp.rotation.z = 0.25 + Math.random() * 0.15;
scene.add(ramp);
}
// 2. Debris piles
for (let i = 0; i < 35; i++) {
const s = 0.3 + Math.random() * 0.7;
const debris = new THREE.Mesh(
new THREE.BoxGeometry(s, s, s),
new THREE.MeshStandardMaterial({ color: 0x555555, roughness: 1 })
);
debris.position.set((Math.random() - 0.5) * 22, s / 2 + 0.05, (Math.random() - 0.5) * 22);
debris.rotation.set(Math.random() * Math.PI, Math.random() * Math.PI, Math.random() * Math.PI);
scene.add(debris);
}
// 3. Barriers
for (let i = 0; i < 10; i++) {
const barrier = new THREE.Mesh(
new THREE.CylinderGeometry(0.55, 0.55, 1.1, 10),
new THREE.MeshStandardMaterial({ color: 0xffaa00, roughness: 0.4, metalness: 0.6 })
);
const a = (i / 10) * Math.PI * 2;
barrier.position.set(Math.cos(a) * 13, 0.55, Math.sin(a) * 13);
scene.add(barrier);
}
}
buildObstacles();
// --- Truck factory ---
function createTruck(colorHex) {
const truck = new THREE.Group();
// Main body (Cybertruck-style flat box)
const body = new THREE.Mesh(
new THREE.BoxGeometry(2.4, 0.75, 4.2),
new THREE.MeshStandardMaterial({ color: colorHex, roughness: 0.25, metalness: 0.85 })
);
body.position.y = 0.85;
body.castShadow = true;
truck.add(body);
// Cabin
const cabin = new THREE.Mesh(
new THREE.BoxGeometry(1.9, 1.0, 1.9),
new THREE.MeshStandardMaterial({ color: 0x888888, roughness: 0.2, metalness: 0.9 })
);
cabin.position.set(0, 1.35, -0.6);
truck.add(cabin);
// Wheels (big monster-truck style)
const wheelGeo = new THREE.CylinderGeometry(0.55, 0.55, 0.9, 10);
const wheelMat = new THREE.MeshStandardMaterial({ color: 0x1a1a1a, roughness: 0.9 });
const offsets = [
[1.05, 0.55, 1.3], [-1.05, 0.55, 1.3],
[1.05, 0.55, -1.3], [-1.05, 0.55, -1.3]
];
offsets.forEach(off => {
const w = new THREE.Mesh(wheelGeo, wheelMat);
w.position.set(...off);
w.rotation.x = Math.PI / 2;
truck.add(w);
});
return truck;
}
// --- Game state ---
let trucks = [];
let playerTruck = null;
let score = 0;
let timeLeft = 60;
let clockRunning = true;
let photoMode = false;
let running = true;
function initGame() {
// Real game state for #demo
if (window.location.hash === '#demo') {
score = 5000;
timeLeft = 20;
}
const colors = [0xaaaaaa, 0xcc3333, 0x3333cc, 0x33aa33, 0xaa33aa];
for (let i = 0; i < 5; i++) {
const mesh = createTruck(colors[i]);
mesh.position.set((Math.random() - 0.5) * 10, 0, (Math.random() - 0.5) * 10);
mesh.rotation.y = Math.random() * Math.PI * 2;
scene.add(mesh);
const t = {
mesh: mesh,
velocity: new THREE.Vector3(),
rotSpeed: 0,
hitTimer: 0,
aiTarget: new THREE.Vector3(),
isPlayer: i === 0
};
trucks.push(t);
}
playerTruck = trucks[0];
// Give AI random targets
trucks.forEach(t => {
if (!t.isPlayer) {
t.aiTarget.set((Math.random() - 0.5) * 18, 0, (Math.random() - 0.5) * 18);
}
});
}
initGame();
// --- Input ---
const keys = {};
window.addEventListener('keydown', e => {
const k = e.key.toLowerCase();
keys[k] = true;
if (k === 'p') togglePhotoMode();
if (!audioCtx && (k === 'w' || k === 'a' || k === 's' || k === 'd' || k === 'arrowup' || k === 'arrowdown' || k === 'arrowleft' || k === 'arrowright')) {
initAudio();
}
});
window.addEventListener('keyup', e => {
keys[e.key.toLowerCase()] = false;
});
function togglePhotoMode() {
photoMode = !photoMode;
const overlay = document.getElementById('photoOverlay');
if (photoMode) {
overlay.classList.add('active');
running = false;
} else {
overlay.classList.remove('active');
running = true;
}
document.getElementById('photoScore').textContent = Math.floor(score);
}
// --- Update loop ---
function update() {
// Always refresh overlay content
document.getElementById('photoScore').textContent = Math.floor(score);
if (!running) return;
// Player drive
const p = playerTruck;
const driveSpeed = 0.18;
const turnRate = 0.055;
if (keys['w'] || keys['arrowup']) {
p.velocity.z = -driveSpeed;
} else if (keys['s'] || keys['arrowdown']) {
p.velocity.z = driveSpeed;
} else {
p.velocity.z *= 0.92;
}
if (keys['a'] || keys['arrowleft']) {
p.rotSpeed = turnRate;
} else if (keys['d'] || keys['arrowright']) {
p.rotSpeed = -turnRate;
} else {
p.rotSpeed *= 0.85;
}
p.mesh.rotation.y += p.rotSpeed;
const forward = new THREE.Vector3(0, 0, -1).applyAxisAngle(new THREE.Vector3(0, 1, 0), p.mesh.rotation.y);
p.velocity.copy(forward.multiplyScalar(p.velocity.z));
p.mesh.position.add(p.velocity);
// Soft arena boundary for player
if (p.mesh.position.length() > 22) {
const back = new THREE.Vector3().subVectors(new THREE.Vector3(0, 0, 0), p.mesh.position).normalize();
p.mesh.position.add(back.multiplyScalar(0.3));
p.velocity.multiplyScalar(-0.3);
}
// AI rivals
trucks.forEach(t => {
if (t.isPlayer) return;
// Wander target
if (t.mesh.position.distanceTo(t.aiTarget) < 2.5) {
t.aiTarget.set((Math.random() - 0.5) * 20, 0, (Math.random() - 0.5) * 20);
}
// Separation (prevent clumping wall)
let sep = new THREE.Vector3();
trucks.forEach(other => {
if (other === t) return;
const d = t.mesh.position.distanceTo(other.mesh.position);
if (d < 3.5) {
const away = new THREE.Vector3().subVectors(t.mesh.position, other.mesh.position).normalize();
sep.add(away.multiplyScalar(1 / Math.max(d, 0.5)));
}
});
// Seek target
const seek = new THREE.Vector3().subVectors(t.aiTarget, t.mesh.position).normalize();
const steer = seek.add(sep.multiplyScalar(2.5)).normalize();
// Rotate toward steer
const currentDir = new THREE.Vector3(0, 0, -1).applyAxisAngle(new THREE.Vector3(0, 1, 0), t.mesh.rotation.y);
const cross = new THREE.Vector3().crossVectors(currentDir, steer);
const angle = currentDir.angleTo(steer);
if (cross.y < 0) {
t.mesh.rotation.y += Math.min(angle, 0.06);
} else {
t.mesh.rotation.y -= Math.min(angle, 0.06);
}
// Move forward
const aiVel = new THREE.Vector3(0, 0, -1).applyAxisAngle(new THREE.Vector3(0, 1, 0), t.mesh.rotation.y).multiplyScalar(0.12);
t.mesh.position.add(aiVel);
// Boundary steer
if (t.mesh.position.length() > 21) {
const back = new THREE.Vector3().subVectors(new THREE.Vector3(0, 0, 0), t.mesh.position).normalize();
t.aiTarget.copy(t.mesh.position).add(back.multiplyScalar(8));
}
// Hit timer decay
if (t.hitTimer > 0) {
t.hitTimer--;
if (t.hitTimer === 0) {
// Restore body color (first child is body mesh)
t.mesh.children[0].material.color.setHex(colors[t.isPlayer ? 0 : trucks.indexOf(t)]);
}
}
});
// Collisions (bounding sphere model)
for (let i = 0; i < trucks.length; i++) {
for (let j = i + 1; j < trucks.length; j++) {
const a = trucks[i];
const b = trucks[j];
const dist = a.mesh.position.distanceTo(b.mesh.position);
if (dist < 2.6) {
// Penetration resolution
const overlap = 2.6 - dist;
const dir = new THREE.Vector3().subVectors(a.mesh.position, b.mesh.position).normalize();
a.mesh.position.add(dir.clone().multiplyScalar(overlap * 0.5));
b.mesh.position.sub(dir.clone().multiplyScalar(overlap * 0.5));
// Visible reaction + score
if ((a.isPlayer && !b.isPlayer) || (!a.isPlayer && b.isPlayer)) {
const rival = a.isPlayer ? b : a;
const player = a.isPlayer ? a : b;
score += 500;
rival.hitTimer = 35;
rival.mesh.children[0].material.color.setHex(0xff2222);
rival.mesh.rotation.z = (Math.random() - 0.5) * 0.6;
rival.mesh.rotation.x = (Math.random() - 0.5) * 0.4;
playHitSound();
}
}
}
}
// Clock
if (clockRunning && timeLeft > 0) {
timeLeft -= 1 / 60;
if (timeLeft <= 0) {
timeLeft = 0;
clockRunning = false;
}
}
// HUD
document.getElementById('scoreVal').textContent = Math.floor(score);
document.getElementById('timeVal').textContent = Math.ceil(timeLeft);
// Camera follow
const offset = new THREE.Vector3(0, 13, 20);
offset.applyAxisAngle(new THREE.Vector3(0, 1, 0), playerTruck.mesh.rotation.y);
camera.position.copy(playerTruck.mesh.position).add(offset);
camera.lookAt(playerTruck.mesh.position);
}
function animate() {
requestAnimationFrame(animate);
update();
renderer.render(scene, camera);
}
animate();
// Resize
window.addEventListener('resize', () => {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
});
</script>
</body>
</html>
The notes
- Five trucks: Each AI truck uses a separation steering vector that pushes it away from neighbors within 3.5 units, combined with a wandering target point that respawns randomly; this breaks up line formations and stops them from locking into a single moving wall.
- Demo mode: The initialization checks
if (window.location.hash === '#demo')and assignsscore = 5000; timeLeft = 20;directly into the live state variables before the loop starts, so the HUD and physics run with those real values rather than painting over a separate overlay. - Photo mode: Pressing
Psetsrunning = false, which stops both the physics/AI update step and the clock decrement; the render loop continues drawing the frozen frame while the overlay is visible, and resumes both on the nextP. - Collisions: Bounding-sphere distance checks between truck center points; on overlap, penetration depth is split to push positions apart, and if the player is involved the rival receives a 35-frame hit state with red body tint, random rotation, and the score increments by 500.
Attachments
thinkingmachines/inkling — page