Run Detail
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Provider
openrouter
Challenge Version
v1.0
Turns
1
Duration
61.6s
Total Tokens
20,414
Input Tokens
740
Output Tokens
19,674
Reasoning Tokens
13,447
Reasoning Effort
default
Est. Cost
$0.0000
Started
10/15/2026, 3:47:27 PM
OR Provider
Nvidia
Finish Reason
stop
Generation ID
gen-1792079247-FHp1KvMdPZXQufQtZSDQ
Turns (1)
Turn #1
740 in19,674 out13,447 reasoning20,414 total61.6s
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
Chrome Cyberdome is a low-poly neon stadium where one player-driven Cybertruck battles four AI rivals among ramps, barriers, and tire stacks under a fully populated 360-degree crowd.
The game
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Chrome Cyberdome — Cybertruck Monster Rally</title>
<style>
html, body { margin: 0; height: 100%; overflow: hidden; background: #0b0c10; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
canvas { display: block; }
#hud {
position: absolute; top: 16px; left: 16px;
color: #fff; background: rgba(0,0,0,0.55);
padding: 12px 16px; border-radius: 8px;
pointer-events: none; user-select: none;
border: 1px solid rgba(255,255,255,0.2);
backdrop-filter: blur(4px);
}
#hud h1 { margin: 0 0 6px 0; font-size: 1.1rem; letter-spacing: 2px; text-transform: uppercase; color: #00d2ff; }
#hud .row { font-size: 1.1rem; display: flex; gap: 16px; }
#hud .row div { font-variant-numeric: tabular-nums; }
#photo {
position: absolute; inset: 0; background: rgba(0,0,0,0.8);
color: #fff; display: none; align-items: center; justify-content: center;
flex-direction: column; gap: 14px; pointer-events: none; user-select: none;
z-index: 10;
}
#photo h2 { margin: 0; font-size: 2.5rem; letter-spacing: 4px; color: #00d2ff; text-transform: uppercase; }
#photo p { margin: 0; font-size: 1.6rem; font-variant-numeric: tabular-nums; }
#controls {
position: absolute; bottom: 16px; left: 16px;
color: rgba(255,255,255,0.6); font-size: 0.85rem;
pointer-events: none; user-select: none;
}
</style>
</head>
<body>
<div id="hud">
<h1 id="arenaName">CHROME CYBERDOME</h1>
<div class="row">
<div id="score">Score: 0</div>
<div id="clock">Time: 60</div>
</div>
</div>
<div id="photo">
<h2 id="photoArena">CHROME CYBERDOME</h2>
<p id="photoScore">Score: 0</p>
</div>
<div id="controls">WASD / Arrow keys to drive • P: Photo mode</div>
<script src="https://unpkg.com/three@0.160.0/build/three.min.js"></script>
<script>
/* ---------- Config ---------- */
const ARENA_NAME = 'CHROME CYBERDOME';
const TRUCK_COUNT = 5;
const START_TIME = 60;
const DEMO_TIME = 20;
const DEMO_SCORE = 5000;
/* ---------- State ---------- */
let score = 0;
let timeLeft = START_TIME;
let gameOver = false;
let photoMode = false;
const keys = {};
const isDemo = location.hash === '#demo';
if (isDemo) {
timeLeft = DEMO_TIME;
score = DEMO_SCORE;
}
/* ---------- Three.js setup ---------- */
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x0b0c10);
scene.fog = new THREE.Fog(0x0b0c10, 20, 90);
const camera = new THREE.PerspectiveCamera(55, window.innerWidth / window.innerHeight, 0.1, 200);
camera.position.set(0, 8, 14);
const renderer = new THREE.WebGLRenderer({ antialias: true, powerPreference: "high-performance" });
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
document.body.appendChild(renderer.domElement);
const ambient = new THREE.HemisphereLight(0x88aadd, 0x222233, 0.7);
scene.add(ambient);
const sun = new THREE.DirectionalLight(0xffffff, 1.0);
sun.position.set(30, 50, 30);
sun.castShadow = true;
sun.shadow.mapSize.width = 2048;
sun.shadow.mapSize.height = 2048;
sun.shadow.camera.near = 0.5;
sun.shadow.camera.far = 150;
sun.shadow.camera.left = -60;
sun.shadow.camera.right = 60;
sun.shadow.camera.top = 60;
sun.shadow.camera.bottom = -60;
scene.add(sun);
/* ---------- Audio (Web API, no assets) ---------- */
let audioCtx;
function ensureAudio() {
if (!audioCtx) {
audioCtx = new (window.AudioContext || window.webkitAudioContext)();
}
if (audioCtx.state === 'suspended') audioCtx.resume();
}
function playBoom() {
ensureAudio();
const bufferSize = audioCtx.sampleRate * 0.1;
const buffer = audioCtx.createBuffer(1, bufferSize, audioCtx.sampleRate);
const data = buffer.getChannelData(0);
for (let i = 0; i < bufferSize; i++) data[i] = Math.random() * 2 - 1;
const n = audioCtx.createBufferSource();
n.buffer = buffer;
const g = audioCtx.createGain();
g.gain.setValueAtTime(0.15, audioCtx.currentTime);
g.gain.exponentialRampToValueAtTime(0.001, audioCtx.currentTime + 0.1);
n.connect(g);
g.connect(audioCtx.destination);
n.start();
}
/* ---------- Truck factory ---------- */
function createTruck(color, isPlayer) {
const group = new THREE.Group();
const body = new THREE.Mesh(
new THREE.BoxGeometry(2.2, 1.0, 4.2),
new THREE.MeshStandardMaterial({ color, roughness: 0.4, metalness: 0.8 })
);
body.castShadow = true;
body.receiveShadow = true;
body.position.y = 0.7;
group.add(body);
const cabin = new THREE.Mesh(
new THREE.BoxGeometry(1.6, 0.9, 1.8),
new THREE.MeshStandardMaterial({ color: 0x111111, roughness: 0.6, metalness: 0.9 })
);
cabin.castShadow = true;
cabin.receiveShadow = true;
cabin.position.set(0, 1.35, -0.6);
group.add(cabin);
const wheelMat = new THREE.MeshStandardMaterial({ color: 0x1a1a1a, roughness: 0.9 });
const wheelGeo = new THREE.CylinderGeometry(0.45, 0.45, 0.7, 12);
wheelGeo.rotateZ(Math.PI / 2);
[[-1.2, 0.4, 1.2], [1.2, 0.4, 1.2], [-1.2, 0.4, -1.2], [1.2, 0.4, -1.2]].forEach(p => {
const w = new THREE.Mesh(wheelGeo, wheelMat);
w.castShadow = true;
w.receiveShadow = true;
w.position.set(...p);
group.add(w);
});
scene.add(group);
return {
mesh: group,
isPlayer,
pos: new THREE.Vector3(),
vel: new THREE.Vector3(),
speed: 0,
maxSpeed: isPlayer ? 22 : 18,
accel: 14,
friction: 0.92,
radius: 1.4,
wrecked: false,
aiWander: 0,
aiTargetOffset: new THREE.Vector3((Math.random() - 0.5) * 6, 0, (Math.random() - 0.5) * 6)
};
}
const trucks = [];
for (let i = 0; i < TRUCK_COUNT; i++) {
const c = i === 0 ? 0x00d2ff : Math.floor(Math.random() * 0xffffff);
trucks.push(createTruck(c, i === 0));
}
const startZ = -15;
trucks.forEach((t, i) => {
t.mesh.position.set((i - 2) * 3.5, 0, startZ);
t.pos.copy(t.mesh.position);
});
/* ---------- Ground ---------- */
const ground = new THREE.Mesh(
new THREE.PlaneGeometry(200, 200),
new THREE.MeshStandardMaterial({ color: 0x14181c, roughness: 0.8, metalness: 0.2 })
);
ground.rotation.x = -Math.PI / 2;
ground.receiveShadow = true;
scene.add(ground);
scene.add(new THREE.GridHelper(100, 40, 0x2a333c, 0x161a1f));
/* ---------- Obstacles ---------- */
const obstacles = [];
function addObstacle(mesh, radius) {
mesh.castShadow = true;
mesh.receiveShadow = true;
scene.add(mesh);
obstacles.push({ mesh, radius });
}
for (let i = 0; i < 4; i++) {
const ramp = new THREE.Mesh(
new THREE.BoxGeometry(6, 1.2, 8),
new THREE.MeshStandardMaterial({ color: 0x444444, roughness: 0.7 })
);
ramp.rotation.x = -Math.PI / 6;
const angle = (i / 4) * Math.PI * 2;
ramp.position.set(Math.cos(angle) * 22, 0.6, Math.sin(angle) * 22);
addObstacle(ramp, 4);
}
for (let i = 0; i < 12; i++) {
const bar = new THREE.Mesh(
new THREE.BoxGeometry(3, 1, 1),
new THREE.MeshStandardMaterial({ color: 0x888888, roughness: 0.8 })
);
const angle = Math.random() * Math.PI * 2;
const r = 12 + Math.random() * 14;
bar.position.set(Math.cos(angle) * r, 0.5, Math.sin(angle) * r);
bar.rotation.y = Math.random() * Math.PI;
addObstacle(bar, 1.2);
}
for (let i = 0; i < 8; i++) {
const stack = new THREE.Group();
const tireMat = new THREE.MeshStandardMaterial({ color: 0x111111 });
const tireGeo = new THREE.CylinderGeometry(0.7, 0.7, 0.5, 12);
for (let s = 0; s < 3; s++) {
const t = new THREE.Mesh(tireGeo, tireMat);
t.position.y = s * 0.5;
t.castShadow = true;
t.receiveShadow = true;
stack.add(t);
}
const angle = Math.random() * Math.PI * 2;
const r = 10 + Math.random() * 20;
stack.position.set(Math.cos(angle) * r, 0, Math.sin(angle) * r);
addObstacle(stack, 1.0);
}
for (let i = 0; i < 6; i++) {
const crate = new THREE.Mesh(
new THREE.BoxGeometry(1.4, 1.4, 1.4),
new THREE.MeshStandardMaterial({ color: 0x665544, roughness: 0.9 })
);
const angle = Math.random() * Math.PI * 2;
const r = 8 + Math.random() * 18;
crate.position.set(Math.cos(angle) * r, 0.7, Math.sin(angle) * r);
crate.rotation.y = Math.random() * Math.PI;
addObstacle(crate, 1.0);
}
/* ---------- Crowd & stands ---------- */
function buildStands() {
const standRadius = 34;
const standHeight = 6;
const rows = 5;
const segments = 24;
const personColors = [0xff4444, 0x44ff44, 0x4444ff, 0xffff44, 0xff44ff, 0x44ffff];
for (let seg = 0; seg < segments; seg++) {
const a = (seg / segments) * Math.PI * 2;
const wall = new THREE.Mesh(
new THREE.BoxGeometry(2.2, standHeight, 0.6),
new THREE.MeshStandardMaterial({ color: 0x333333 })
);
wall.position.set(Math.cos(a) * standRadius, standHeight / 2, Math.sin(a) * standRadius);
wall.rotation.y = a + Math.PI / 2;
wall.castShadow = true;
wall.receiveShadow = true;
scene.add(wall);
for (let row = 0; row < rows; row++) {
const y = 1 + row * 1.1;
const rr = standRadius + 1 + row * 0.9;
for (let p = 0; p < 6; p++) {
const pa = a + (p / 6) * 1.6;
const person = new THREE.Mesh(
new THREE.BoxGeometry(0.35, 0.7, 0.25),
new THREE.MeshStandardMaterial({ color: personColors[(row + p) % personColors.length] })
);
person.position.set(Math.cos(pa) * rr, y, Math.sin(pa) * rr);
person.rotation.y = pa + Math.PI / 2;
person.castShadow = true;
person.receiveShadow = true;
scene.add(person);
}
}
}
}
buildStands();
/* ---------- Debris ---------- */
const debris = [];
function spawnDebris(pos) {
for (let i = 0; i < 6; i++) {
const d = new THREE.Mesh(
new THREE.BoxGeometry(0.4, 0.4, 0.4),
new THREE.MeshStandardMaterial({ color: 0x555555 })
);
d.position.copy(pos);
d.castShadow = true;
d.receiveShadow = true;
scene.add(d);
debris.push({
mesh: d,
vel: new THREE.Vector3((Math.random() - 0.5) * 4, (Math.random() - 0.5) * 4, (Math.random() - 0.5) * 4),
life: 1.0
});
}
}
/* ---------- HUD ---------- */
const elArena = document.getElementById('arenaName');
const elScore = document.getElementById('score');
const elClock = document.getElementById('clock');
const elPhoto = document.getElementById('photo');
const elPhotoArena = document.getElementById('photoArena');
const elPhotoScore = document.getElementById('photoScore');
elArena.textContent = ARENA_NAME;
elPhotoArena.textContent = ARENA_NAME;
function updateHUD() {
elScore.textContent = `Score: ${Math.floor(score)}`;
elClock.textContent = `Time: ${Math.ceil(timeLeft)}`;
}
updateHUD();
/* ---------- Input ---------- */
window.addEventListener('keydown', e => {
keys[e.code] = true;
if (e.code === 'KeyP') {
e.preventDefault();
togglePhoto();
}
ensureAudio();
});
window.addEventListener('keyup', e => { keys[e.code] = false; });
window.addEventListener('click', ensureAudio);
window.addEventListener('resize', () => {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
});
function togglePhoto() {
photoMode = !photoMode;
elPhoto.style.display = photoMode ? 'flex' : 'none';
if (photoMode) elPhotoScore.textContent = `Score: ${Math.floor(score)}`;
}
/* ---------- Collision model ---------- */
function resolveTruckObstacle(t, obs) {
const oPos = new THREE.Vector3();
obs.mesh.getWorldPosition(oPos);
const diff = new THREE.Vector3().subVectors(t.pos, oPos);
const dist = diff.length();
const minDist = t.radius + obs.radius;
if (dist < minDist && dist > 0.01) {
const normal = diff.divideScalar(dist);
const overlap = minDist - dist;
t.pos.addScaledVector(normal, overlap * 0.6);
const dot = t.vel.dot(normal);
if (dot < 0) {
t.vel.addScaledVector(normal, -dot * 1.4);
t.vel.multiplyScalar(0.6);
if (Math.abs(dot) > 4) playBoom();
}
}
}
function resolveTruckTruck(a, b) {
const diff = new THREE.Vector3().subVectors(a.pos, b.pos);
const dist = diff.length();
const minDist = a.radius + b.radius;
if (dist < minDist && dist > 0.01) {
const normal = diff.divideScalar(dist);
const overlap = minDist - dist;
a.pos.addScaledVector(normal, overlap * 0.5);
b.pos.addScaledVector(normal, -overlap * 0.5);
const relVel = new THREE.Vector3().subVectors(a.vel, b.vel);
const sepVel = relVel.dot(normal);
if (sepVel < 0) {
const restitution = 0.5;
const j = -(1 + restitution) * sepVel / 2;
const impulse = new THREE.Vector3().copy(normal).multiplyScalar(j);
a.vel.add(impulse);
b.vel.sub(impulse);
a.vel.multiplyScalar(0.8);
b.vel.multiplyScalar(0.8);
const hitter = a.isPlayer ? a : b;
const victim = a.isPlayer ? b : a;
if (hitter.isPlayer && !victim.wrecked) {
score += 250;
playBoom();
if (Math.abs(sepVel) > 6) {
wreckTruck(victim);
score += 750;
}
}
}
}
}
function wreckTruck(t) {
if (t.wrecked) return;
t.wrecked = true;
t.mesh.traverse(c => { if (c.isMesh) c.material.color.set(0x333333); });
spawnDebris(t.pos);
playBoom();
}
/* ---------- Truck movement ---------- */
function updateTruckInput(t, dt) {
if (t.wrecked) {
t.vel.multiplyScalar(0.9);
t.pos.addScaledVector(t.vel, dt);
t.mesh.position.copy(t.pos);
return;
}
const forward = keys['KeyW'] || keys['ArrowUp'];
const back = keys['KeyS'] || keys['ArrowDown'];
const left = keys['KeyA'] || keys['ArrowLeft'];
const right = keys['KeyD'] || keys['ArrowRight'];
if (forward) t.speed += t.accel * dt;
if (back) t.speed -= t.accel * dt;
if (!forward && !back) t.speed *= t.friction;
t.speed = Math.max(-t.maxSpeed * 0.6, Math.min(t.maxSpeed, t.speed));
const steer = (left ? -1 : 0) + (right ? 1 : 0);
t.mesh.rotation.y += steer * 2.6 * dt * (Math.abs(t.speed) / t.maxSpeed + 0.2);
const dir = new THREE.Vector3(0, 0, 1).applyQuaternion(t.mesh.quaternion);
t.vel.copy(dir).multiplyScalar(t.speed);
t.pos.addScaledVector(t.vel, dt);
t.mesh.position.copy(t.pos);
}
function updateTruckAI(t, dt) {
if (t.wrecked) {
t.vel.multiplyScalar(0.9);
t.pos.addScaledVector(t.vel, dt);
t.mesh.position.copy(t.pos);
return;
}
const player = trucks[0];
t.aiWander -= dt;
if (t.aiWander <= 0) {
t.aiWander = 2 + Math.random() * 3;
t.aiTargetOffset.set((Math.random() - 0.5) * 8, 0, (Math.random() - 0.5) * 8);
}
const target = new THREE.Vector3().copy(player.pos).add(t.aiTargetOffset);
const desired = new THREE.Vector3().subVectors(target, t.pos);
desired.y = 0;
if (desired.length() > 0.1) desired.normalize();
const repel = new THREE.Vector3();
let repelCount = 0;
trucks.forEach(other => {
if (other === t || other.wrecked) return;
const d = new THREE.Vector3().subVectors(t.pos, other.pos);
const dLen = d.length();
if (dLen < 6 && dLen > 0.01) {
repel.add(d.normalize().multiplyScalar((6 - dLen) / 6));
repelCount++;
}
});
if (repelCount > 0) {
repel.divideScalar(repelCount);
desired.add(repel).normalize();
}
const currentDir = new THREE.Vector3(0, 0, 1).applyQuaternion(t.mesh.quaternion);
const angle = Math.atan2(desired.x, desired.z) - Math.atan2(currentDir.x, currentDir.z);
const normAngle = ((angle + Math.PI) % (Math.PI * 2)) - Math.PI;
const steer = Math.max(-1, Math.min(1, normAngle / 1.5));
t.mesh.rotation.y += steer * 2.4 * dt;
const dir = new THREE.Vector3(0, 0, 1).applyQuaternion(t.mesh.quaternion);
t.speed = t.maxSpeed * 0.7;
t.vel.copy(dir).multiplyScalar(t.speed);
t.pos.addScaledVector(t.vel, dt);
t.mesh.position.copy(t.pos);
}
/* ---------- Main loop ---------- */
let lastTime = performance.now();
function update(dt) {
if (!gameOver) {
timeLeft -= dt;
if (timeLeft <= 0) {
timeLeft = 0;
gameOver = true;
}
}
updateTruckInput(trucks[0], dt);
for (let i = 1; i < trucks.length; i++) updateTruckAI(trucks[i], dt);
for (let i = 0; i < trucks.length; i++) {
for (let j = i + 1; j < trucks.length; j++) {
resolveTruckTruck(trucks[i], trucks[j]);
}
}
trucks.forEach(t => {
if (t.wrecked) return;
obstacles.forEach(o => resolveTruckObstacle(t, o));
});
trucks.forEach(t => { t.mesh.position.copy(t.pos); t.mesh.position.y = 0; });
const p = trucks[0];
const camOffset = new THREE.Vector3(0, 7, -12).applyQuaternion(p.mesh.quaternion);
camera.position.copy(p.pos).add(camOffset);
camera.lookAt(p.pos.clone().add(new THREE.Vector3(0, 0, 1).applyQuaternion(p.mesh.quaternion).multiplyScalar(10)));
for (let i = debris.length - 1; i >= 0; i--) {
const d = debris[i];
d.mesh.position.addScaledVector(d.vel, dt);
d.vel.multiplyScalar(0.9);
d.vel.y -= 9.8 * dt;
d.life -= dt;
if (d.life <= 0) {
scene.remove(d.mesh);
debris.splice(i, 1);
}
}
updateHUD();
if (photoMode) elPhotoScore.textContent = `Score: ${Math.floor(score)}`;
}
function animate(now) {
requestAnimationFrame(animate);
const dt = Math.min((now - lastTime) / 1000, 0.1);
lastTime = now;
if (!photoMode && !gameOver) update(dt);
else updateHUD();
renderer.render(scene, camera);
}
requestAnimationFrame(animate);
</script>
</body>
</html>
The notes
- Five trucks: each AI rival targets the player with a random lateral/longitudinal offset and a wander timer that changes that offset every few seconds, while also applying a repulsion force from any other truck within six units. Staggered start positions, individual offsets, and mutual repulsion keep the four rivals from clumping into one moving wall.
- Demo mode:
#demosetstimeLeft = 20andscore = 5000directly on the live simulation variables before the first frame. It is not an overlay because the clock ticks down from twenty, the score begins at five thousand, and all normal scoring, collisions, wrecking, and game-over logic run unchanged. - Photo mode: pressing
Phalts the physics step (updateis skipped), but the render loop keeps drawing the last frame so the photo card is not blank; the simulation does not advance behind the overlay. - Collisions: every truck is treated as a moving sphere and every static obstacle as a sphere; each frame the code computes centre distances for all truck pairs and truck–obstacle pairs. On overlap it separates the objects along the contact normal, reflects relative velocity with restitution, applies damping, and if the closing speed exceeds a threshold it marks the victim wrecked (tinted dark gray, physics frozen, debris spawned) and awards the player score. Only the player earns points from truck contact.
Attachments
nvidia/nemotron-3.5-super-vl:free — page