Run Detail
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Provider
openrouter
Challenge Version
v1.0
Turns
1
Duration
191.3s
Total Tokens
19,394
Input Tokens
847
Output Tokens
18,547
Reasoning Tokens
13,068
Reasoning Effort
default
Cached Input Tokens
128
Est. Cost
$0.0797
Started
10/15/2026, 6:43:52 PM
OR Provider
Fireworks
Finish Reason
stop
Generation ID
gen-1792089832-dslVPu2A2bVyVzkkT35i
Turns (1)
Turn #1
847 in18,547 out13,068 reasoning128 cached19,394 total191.2s
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
Welcome to the VOLT CRATER THUNDERDOME, a neon-lit monster-truck demolition rally where five angular Cybertrucks shred dirt hills, smash tire stacks and slam each other under roaring stadium lights.
The game
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<title>VOLT CRATER THUNDERDOME</title>
<style>
html,body{margin:0;height:100%;overflow:hidden;background:#0a0e1a;font-family:monospace}
canvas{display:block}
#hud{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;padding:10px 14px;color:#fff;background:linear-gradient(to bottom,rgba(0,0,0,0.85),transparent);pointer-events:none;font-size:14px;letter-spacing:1px}
#hud b{color:#00ffff}
#controls{position:absolute;bottom:10px;left:10px;color:#fff;background:rgba(0,0,0,0.55);padding:6px 10px;font-size:12px;border:1px solid rgba(255,255,255,0.2)}
#photoOverlay{position:absolute;inset:0;display:none;align-items:center;justify-content:center;flex-direction:column;background:rgba(0,0,0,0.78);color:#fff;text-align:center;z-index:10}
#photoOverlay.active{display:flex}
#photoOverlay h1{font-size:42px;margin:0;color:#00ffff;letter-spacing:3px;text-shadow:0 0 12px #00ffff}
#photoOverlay p{font-size:18px;margin:8px}
</style>
</head>
<body>
<div id="hud"><div id="arenaName">VOLT CRATER THUNDERDOME</div><div id="score">SCORE: 0</div><div id="clock">60.0s</div></div>
<div id="controls">WASD / ARROWS to drive — P for Photo Mode</div>
<div id="photoOverlay"><h1 id="photoArena">VOLT CRATER THUNDERDOME</h1><p id="photoScore">SCORE: 0</p><p>PHOTO MODE — Press P to resume</p></div>
<script src="https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.min.js"></script>
<script>
(()=>{
const ARENA_NAME="VOLT CRATER THUNDERDOME";
let score=0;
let timeRemaining=60;
const isDemo=window.location.hash==="#demo";
if(isDemo){score=5000;timeRemaining=20;}
let isPhotoMode=false;
let isGameOver=false;
const scoreEl=document.getElementById('score');
const clockEl=document.getElementById('clock');
const arenaEl=document.getElementById('arenaName');
arenaEl.textContent=ARENA_NAME;
const photoOverlay=document.getElementById('photoOverlay');
const photoScore=document.getElementById('photoScore');
const photoArena=document.getElementById('photoArena');
photoArena.textContent=ARENA_NAME;
const scene=new THREE.Scene();
scene.background=new THREE.Color(0x0a0e1a);
scene.fog=new THREE.Fog(0x0a0e1a,45,95);
const camera=new THREE.PerspectiveCamera(70,innerWidth/innerHeight,0.1,200);
const renderer=new THREE.WebGLRenderer({antialias:true});
renderer.setSize(innerWidth,innerHeight);
renderer.shadowMap.enabled=true;
document.body.appendChild(renderer.domElement);
scene.add(new THREE.AmbientLight(0xffffff,0.7));
const dir=new THREE.DirectionalLight(0xffffff,1.1);
dir.position.set(20,40,12);
dir.castShadow=true;
dir.shadow.mapSize.set(2048,2048);
scene.add(dir);
const pl=new THREE.PointLight(0xffaa66,1.2,90);
pl.position.set(0,28,0);
scene.add(pl);
const groundGeo=new THREE.PlaneGeometry(80,80);
const groundMat=new THREE.MeshStandardMaterial({color:0x3a2a1a,roughness:0.95});
const ground=new THREE.Mesh(groundGeo,groundMat);
ground.rotation.x=-Math.PI/2;
ground.receiveShadow=true;
scene.add(ground);
const grid=new THREE.GridHelper(80,20,0x555555,0x333333);
grid.position.y=0.05;
scene.add(grid);
const wallMat=new THREE.MeshStandardMaterial({color:0x44464a});
function addWall(x,z,w,h){
const g=new THREE.BoxGeometry(w,4,h);
const m=new THREE.Mesh(g,wallMat);
m.position.set(x,2,z);
m.castShadow=true;m.receiveShadow=true;
scene.add(m);
}
addWall(0,41,84,2);addWall(0,-41,84,2);addWall(41,0,2,84);addWall(-41,0,2,84);
const standsMat=new THREE.MeshStandardMaterial({color:0x1e1e22});
function grand(x,z,w,d,ry){
const g=new THREE.BoxGeometry(w,6,d);
const m=new THREE.Mesh(g,standsMat);
m.position.set(x,5,z);
m.rotation.y=ry;
m.rotation.x=0.28;
m.receiveShadow=true;
scene.add(m);
}
grand(0,48,80,12,0);grand(0,-48,80,12,Math.PI);grand(48,0,80,12,Math.PI/2);grand(-48,0,80,12,-Math.PI/2);
const crowdGroup=new THREE.Group();
const crowdColors=[0xff5555,0x55ff55,0x5555ff,0xffff55,0xff55ff,0x55ffff,0xffffff,0xffaa00];
const crowdGeo=new THREE.CapsuleGeometry(0.26,0.6,4,8);
for(let i=0;i<360;i++){
const ang=(i/360)*Math.PI*2;
const rad=42+Math.random()*6;
const x=Math.cos(ang)*rad, z=Math.sin(ang)*rad;
const y=6+Math.random()*3;
const mat=new THREE.MeshStandardMaterial({color:crowdColors[Math.floor(Math.random()*crowdColors.length)]});
const m=new THREE.Mesh(crowdGeo,mat);
m.position.set(x,y,z);
m.rotation.y=-ang;
crowdGroup.add(m);
if(i%2===0){
const r2=rad+2.2;
const x2=Math.cos(ang)*r2, z2=Math.sin(ang)*r2;
const m2=new THREE.Mesh(crowdGeo,mat.clone());
m2.position.set(x2,y+1.3,z2);
m2.rotation.y=-ang;
crowdGroup.add(m2);
}
}
scene.add(crowdGroup);
const obstacles=[];
const hillMat=new THREE.MeshStandardMaterial({color:0x8b5a2b});
for(let i=0;i<3;i++){
const g=new THREE.ConeGeometry(4+Math.random()*1.5,3,8);
const m=new THREE.Mesh(g,hillMat);
const p=new THREE.Vector3((Math.random()-0.5)*50,0,(Math.random()-0.5)*50);
if(p.length()<12) p.x+=16;
m.position.copy(p);m.position.y=1.5;m.castShadow=true;
scene.add(m);obstacles.push({mesh:m,pos:p.clone(),radius:4.5,type:'hill'});
}
const tireMat=new THREE.MeshStandardMaterial({color:0x111111});
for(let i=0;i<4;i++){
const grp=new THREE.Group();
for(let s=0;s<3;s++){
const g=new THREE.TorusGeometry(1.2,0.38,8,16);
const m=new THREE.Mesh(g,tireMat);
m.rotation.x=Math.PI/2;m.position.y=s*0.8;grp.add(m);
}
const p=new THREE.Vector3((Math.random()-0.5)*50,0,(Math.random()-0.5)*50);
if(p.length()<12) p.x+=18;
grp.position.copy(p);grp.position.y=0.4;scene.add(grp);
obstacles.push({mesh:grp,pos:p.clone(),radius:2.2,type:'tires'});
}
const barrierMat=new THREE.MeshStandardMaterial({color:0x8a8a8a});
for(let i=0;i<5;i++){
const g=new THREE.BoxGeometry(6,1.2,1.5);
const m=new THREE.Mesh(g,barrierMat);
const p=new THREE.Vector3((Math.random()-0.5)*50,0,(Math.random()-0.5)*50);
if(p.length()<10) p.z+=15;
m.position.copy(p);m.position.y=0.6;m.rotation.y=Math.random()*Math.PI;m.castShadow=true;
scene.add(m);obstacles.push({mesh:m,pos:p.clone(),radius:3.5,type:'barrier'});
}
const debrisMat=new THREE.MeshStandardMaterial({color:0x5a3a1a});
for(let i=0;i<6;i++){
const grp=new THREE.Group();
for(let b=0;b<5;b++){
const g=new THREE.BoxGeometry(0.8+Math.random()*0.5,0.4,0.8);
const m=new THREE.Mesh(g,debrisMat);
m.position.set((Math.random()-0.5)*3,Math.random()*0.5,(Math.random()-0.5)*3);
m.rotation.set(Math.random()*Math.PI,Math.random()*Math.PI,Math.random()*Math.PI);
grp.add(m);
}
const p=new THREE.Vector3((Math.random()-0.5)*60,0,(Math.random()-0.5)*60);
grp.position.copy(p);grp.position.y=0.2;scene.add(grp);
obstacles.push({mesh:grp,pos:p.clone(),radius:2.5,type:'debris'});
}
function createTruckMesh(col){
const g=new THREE.Group();
const body=new THREE.Mesh(new THREE.BoxGeometry(2.2,1.0,3.8),new THREE.MeshStandardMaterial({color:col,metalness:0.6,roughness:0.3}));
body.position.y=0.9;body.castShadow=true;g.add(body);
const cabin=new THREE.Mesh(new THREE.BoxGeometry(2.0,0.7,1.8),new THREE.MeshStandardMaterial({color:0x111111}));
cabin.position.set(0,1.6,-0.4);cabin.castShadow=true;g.add(cabin);
const wind=new THREE.Mesh(new THREE.BoxGeometry(1.9,0.05,1.2),new THREE.MeshStandardMaterial({color:0x88ccff,metalness:0.8,roughness:0.1}));
wind.position.set(0,1.5,0.6);wind.rotation.x=Math.PI/5;g.add(wind);
const wheelGeo=new THREE.CylinderGeometry(0.5,0.5,0.4,12);
const wheelMat=new THREE.MeshStandardMaterial({color:0x111111});
[[-1.1,0.5,1.2],[1.1,0.5,1.2],[-1.1,0.5,-1.2],[1.1,0.5,-1.2]].forEach(p=>{
const w=new THREE.Mesh(wheelGeo,wheelMat);w.rotation.z=Math.PI/2;w.position.set(p[0],p[1],p[2]);w.castShadow=true;g.add(w);
});
const light=new THREE.Mesh(new THREE.BoxGeometry(2.0,0.15,0.1),new THREE.MeshStandardMaterial({color:0xffffff,emissive:0xffffff,emissiveIntensity:0.9}));
light.position.set(0,0.9,1.95);g.add(light);
return g;
}
const truckColors=[0x00ffff,0xff2222,0x22ff22,0xffaa00,0xaa22ff];
const starts=[new THREE.Vector3(0,0,0),new THREE.Vector3(15,0,15),new THREE.Vector3(-15,0,15),new THREE.Vector3(15,0,-15),new THREE.Vector3(-15,0,-15)];
const trucks=[];
for(let i=0;i<5;i++){
const mesh=createTruckMesh(truckColors[i]);
mesh.position.copy(starts[i]);scene.add(mesh);
trucks.push({mesh,pos:starts[i].clone(),vel:new THREE.Vector3(),heading:Math.random()*Math.PI*2,isPlayer:i===0,cooldown:0,flash:0,aiTarget:new THREE.Vector3((Math.random()-0.5)*40,0,(Math.random()-0.5)*40),aiTimer:0});
}
const player=trucks[0];
const keys={};
addEventListener('keydown',e=>{
keys[e.key.toLowerCase()]=true;
if(e.key==='p'||e.key==='P'){
isPhotoMode=!isPhotoMode;
photoOverlay.classList.toggle('active',isPhotoMode);
if(isPhotoMode) photoScore.textContent=`SCORE: ${Math.floor(score)}`;
}
});
addEventListener('keyup',e=>{keys[e.key.toLowerCase()]=false;});
let audioCtx=null;
function beep(f,d,v=0.2){
try{
if(!audioCtx) audioCtx=new (window.AudioContext||window.webkitAudioContext)();
if(audioCtx.state==='suspended') audioCtx.resume();
const o=audioCtx.createOscillator(),g=audioCtx.createGain();
o.frequency.value=f;o.connect(g);g.connect(audioCtx.destination);
g.gain.value=v;o.start();g.gain.exponentialRampToValueAtTime(0.0001,audioCtx.currentTime+d);o.stop(audioCtx.currentTime+d);
}catch(e){}
}
function updatePhysics(dt){
const accel=18,maxSpeed=14,turnSpeed=2.2;
let steer=0,throttle=0;
if(keys['w']||keys['arrowup']) throttle+=1;
if(keys['s']||keys['arrowdown']) throttle-=0.6;
if(keys['a']||keys['arrowleft']) steer+=1;
if(keys['d']||keys['arrowright']) steer-=1;
trucks.forEach((t,idx)=>{
let dSteer=steer,dThrottle=throttle;
if(!t.isPlayer){
t.aiTimer-=dt;
if(t.aiTimer<=0){
t.aiTimer=1.5+Math.random()*2;
if(Math.random()<0.4){t.aiTarget.copy(player.pos);t.aiTarget.x+=(Math.random()-0.5)*10;t.aiTarget.z+=(Math.random()-0.5)*10;}
else t.aiTarget.set((Math.random()-0.5)*60,0,(Math.random()-0.5)*60);
}
let sepX=0,sepZ=0;
trucks.forEach(o=>{if(o===t) return;const dx=t.pos.x-o.pos.x,dz=t.pos.z-o.pos.z,dist=Math.sqrt(dx*dx+dz*dz);if(dist<10&&dist>0.1){const f=(10-dist)/10;sepX+=(dx/dist)*f*1.5;sepZ+=(dz/dist)*f*1.5;}});
obstacles.forEach(o=>{const dx=t.pos.x-o.pos.x,dz=t.pos.z-o.pos.z,dist=Math.sqrt(dx*dx+dz*dz);if(dist<o.radius+4&&dist>0.1){const f=(o.radius+4-dist)/4;sepX+=(dx/dist)*f*2;sepZ+=(dz/dist)*f*2;}});
if(Math.abs(t.pos.x)>32) sepX+=(t.pos.x>0?-1:1)*1.5;
if(Math.abs(t.pos.z)>32) sepZ+=(t.pos.z>0?-1:1)*1.5;
const tx=t.aiTarget.x+sepX*5,tz=t.aiTarget.z+sepZ*5;
const dx=tx-t.pos.x,dz=tz-t.pos.z;
const targetAng=Math.atan2(dx,dz);
let diff=targetAng-t.heading;while(diff>Math.PI) diff-=Math.PI*2;while(diff<-Math.PI) diff+=Math.PI*2;
dSteer=Math.max(-1,Math.min(1,diff*1.2));
const distT=Math.sqrt(dx*dx+dz*dz);
dThrottle=distT>5?0.9:0.6;
if(Math.abs(diff)>0.8) dThrottle*=0.5;
dThrottle+=(Math.random()-0.5)*0.1;
}
const speedF=Math.min(1,t.vel.length()/6);
t.heading+=dSteer*turnSpeed*dt*(t.isPlayer?0.6+speedF*0.7:1);
const fwd=new THREE.Vector3(Math.sin(t.heading),0,Math.cos(t.heading));
t.vel.addScaledVector(fwd,dThrottle*accel*dt);
t.vel.multiplyScalar(0.98);
if(t.vel.length()>maxSpeed) t.vel.setLength(maxSpeed);
const nxt=t.pos.clone().addScaledVector(t.vel,dt);
if(Math.abs(nxt.x)>38){nxt.x=Math.sign(nxt.x)*38;t.vel.x*=-0.5;if(t.isPlayer) beep(120,0.1);}
if(Math.abs(nxt.z)>38){nxt.z=Math.sign(nxt.z)*38;t.vel.z*=-0.5;if(t.isPlayer) beep(120,0.1);}
t.pos.copy(nxt);
t.mesh.position.copy(t.pos);
t.mesh.position.y=0.2+Math.abs(Math.sin(performance.now()*0.01+idx))*0.05;
t.mesh.rotation.y=t.heading;
t.mesh.rotation.z=-dSteer*0.15*speedF;
t.mesh.rotation.x=t.vel.length()*0.01;
if(t.cooldown>0) t.cooldown-=dt;
if(t.flash>0){t.flash-=dt;const inten=Math.sin(t.flash*20)*0.5+0.5;t.mesh.scale.set(1+inten*0.1,1+inten*0.1,1+inten*0.1);} else t.mesh.scale.set(1,1,1);
});
for(let i=0;i<trucks.length;i++) for(let j=i+1;j<trucks.length;j++){
const a=trucks[i],b=trucks[j];
const dx=a.pos.x-b.pos.x,dz=a.pos.z-b.pos.z,dist=Math.sqrt(dx*dx+dz*dz),minD=3.2;
if(dist<minD&&dist>0.01){
const overlap=minD-dist,nx=dx/dist,nz=dz/dist;
a.pos.x+=nx*overlap*0.5;a.pos.z+=nz*overlap*0.5;b.pos.x-=nx*overlap*0.5;b.pos.z-=nz*overlap*0.5;
const rvx=a.vel.x-b.vel.x,rvz=a.vel.z-b.vel.z,dot=rvx*nx+rvz*nz;
if(dot<0){const imp=-dot*0.8;a.vel.x+=nx*imp;a.vel.z+=nz*imp;b.vel.x-=nx*imp;b.vel.z-=nz*imp;} else {a.vel.x+=nx*1.5;a.vel.z+=nz*1.5;b.vel.x-=nx*1.5;b.vel.z-=nz*1.5;}
const playerHit=a.isPlayer||b.isPlayer,speed=Math.max(a.vel.length(),b.vel.length());
if(playerHit&&speed>5&&a.cooldown<=0&&b.cooldown<=0){const pts=Math.floor(100+speed*20);score+=pts;beep(400+Math.random()*200,0.15,0.3);a.flash=0.3;b.flash=0.3;a.cooldown=0.5;b.cooldown=0.5;}
else if(speed>3){if(a.cooldown<=0) a.flash=0.2;if(b.cooldown<=0) b.flash=0.2;a.cooldown=0.3;b.cooldown=0.3;beep(200,0.08,0.15);}
}
}
trucks.forEach(t=>{
obstacles.forEach(o=>{
const dx=t.pos.x-o.pos.x,dz=t.pos.z-o.pos.z,dist=Math.sqrt(dx*dx+dz*dz),minD=o.radius+1.6;
if(dist<minD&&dist>0.01){
const overlap=minD-dist,nx=dx/dist,nz=dz/dist;
t.pos.x+=nx*overlap;t.pos.z+=nz*overlap;
const dot=t.vel.x*nx+t.vel.z*nz;
if(dot<0){t.vel.x-=2*dot*nx*0.7;t.vel.z-=2*dot*nz*0.7;}
if(t.isPlayer&&t.cooldown<=0){score+=25;t.flash=0.2;t.cooldown=0.3;beep(150,0.1,0.2);}
}
});
});
crowdGroup.children.forEach((c,i)=>{c.position.y+=Math.sin(performance.now()*0.002+i)*0.002;});
}
function updateHUD(){
scoreEl.textContent=`SCORE: ${Math.floor(score)}`;
clockEl.textContent=`${Math.max(0,timeRemaining).toFixed(1)}s`;
if(timeRemaining<=0&&!isGameOver){
isGameOver=true;
const d=document.createElement('div');
d.style.position='absolute';d.style.inset='0';d.style.display='flex';d.style.alignItems='center';d.style.justifyContent='center';d.style.flexDirection='column';d.style.background='rgba(0,0,0,0.7)';d.style.color='#fff';d.style.fontFamily='monospace';
d.innerHTML=`<h1 style="font-size:48px;margin:0;">FINISH!</h1><p style="font-size:24px;">FINAL SCORE: ${Math.floor(score)}</p><p>Refresh to play again</p>`;
document.body.appendChild(d);
}
}
let last=performance.now();
function animate(){
requestAnimationFrame(animate);
const now=performance.now(),dt=Math.min(0.033,(now-last)/1000);last=now;
if(!isPhotoMode&&!isGameOver&&timeRemaining>0){updatePhysics(dt);timeRemaining-=dt;if(timeRemaining<0) timeRemaining=0;}
const camDist=12,camH=8;
const tp=new THREE.Vector3(player.pos.x-Math.sin(player.heading)*camDist,camH,player.pos.z-Math.cos(player.heading)*camDist);
camera.position.lerp(tp,0.08);
camera.lookAt(player.pos.x,1,player.pos.z);
if(player.flash>0){camera.position.x+=(Math.random()-0.5)*0.2;camera.position.z+=(Math.random()-0.5)*0.2;}
renderer.render(scene,camera);
updateHUD();
}
animate();
addEventListener('resize',()=>{camera.aspect=innerWidth/innerHeight;camera.updateProjectionMatrix();renderer.setSize(innerWidth,innerHeight);});
updateHUD();
})();
</script>
</body>
</html>
The notes
- Five trucks: AI uses separation steering — each rival adds a repulsion vector from other trucks within 10 units, from obstacles, and from walls to its chase/wander target, with random target reselection, so they fan out instead of forming a wall.
- Demo mode:
if(window.location.hash==="#demo"){score=5000;timeRemaining=20;}sets the realscoreandtimeRemainingvariables used by physics, HUD and clock, not a CSS overlay — the game runs normally with those starting values. - Photo mode: Pressing
PtogglesisPhotoMode; when true the physics step (updatePhysics) and clock decrement are skipped entirely while the render loop keeps drawing the frozen frame under an overlay showing arena name and score. - Collisions: Every frame I compute center-distance checks for truck-truck (3.2m) and truck-obstacle (radius+1.6m); on overlap I resolve penetration, compute normal impulse from relative velocity dot normal, apply bounce, add score and trigger flash/cooldown for visible wreck reaction.
Attachments
meta/muse-spark-open — page