3D Browser Obby Game with Three.js

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>3D Browser Obby</title>
    <style>
        body { margin: 0; overflow: hidden; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: #000; }
        #ui { position: absolute; top: 20px; left: 20px; color: white; text-shadow: 2px 2px 4px rgba(0,0,0,0.5); pointer-events: none; }
        #timer { font-size: 24px; font-weight: bold; }
        #instructions { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); color: white; background: rgba(0,0,0,0.5); padding: 10px 20px; border-radius: 20px; }
        #win-screen { display: none; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); background: white; padding: 40px; border-radius: 15px; text-align: center; box-shadow: 0 0 20px rgba(0,0,0,0.5); }
        button { padding: 10px 20px; font-size: 18px; cursor: pointer; background: #2ecc71; border: none; color: white; border-radius: 5px; margin-top: 10px; }
    </style>
</head>
<body>

<div id="ui">
        <div id="timer">Time: 0.0s</div>
        <div>Level: The Neon Void</div>
    </div>

<div id="instructions">WASD to Move | SPACE to Jump | R to Reset</div>

<div id="win-screen">
        <h1>YOU MADE IT!</h1>
        <p id="final-time"></p>
        <button onclick="location.reload()">Play Again</button>
    </div>

init();
        animate();

function init() {
            // Scene & Camera
            scene = new THREE.Scene();
            scene.background = new THREE.Color(0x0a0a12);
            scene.fog = new THREE.FogExp2(0x0a0a12, 0.02);

camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
            
            // Renderer
            renderer = new THREE.WebGLRenderer({ antialias: true });
            renderer.setSize(window.innerWidth, window.innerHeight);
            renderer.setPixelRatio(window.devicePixelRatio);
            document.body.appendChild(renderer.domElement);

// Lighting
            const ambientLight = new THREE.AmbientLight(0xffffff, 0.6);
            scene.add(ambientLight);
            const sunLight = new THREE.DirectionalLight(0xffffff, 0.8);
            sunLight.position.set(10, 20, 10);
            scene.add(sunLight);

// Player (The "Character")
            const playerGeo = new THREE.BoxGeometry(1, 2, 1);
            const playerMat = new THREE.MeshPhongMaterial({ color: 0x3498db });
            player = new THREE.Mesh(playerGeo, playerMat);
            player.position.y = 5;
            scene.add(player);

// Level Design (The Obby)
            createPlatform(0, 0, 0, 10, 1, 10, 0x2c3e50); // Start
            createPlatform(0, 0, -15, 5, 1, 5, 0xe74c3c); 
            createPlatform(8, 2, -25, 5, 1, 5, 0xf1c40f);
            createPlatform(-8, 4, -35, 5, 1, 5, 0x9b59b6);
            createPlatform(0, 6, -50, 3, 1, 3, 0x1abc9c);
            createPlatform(10, 8, -60, 2, 1, 2, 0xe67e22);
            createPlatform(0, 10, -75, 15, 1, 15, 0x2ecc71, true); // End Goal

// Controls
            document.addEventListener('keydown', (e) => onKey(e.code, true));
            document.addEventListener('keyup', (e) => onKey(e.code, false));
            window.addEventListener('resize', onWindowResize);
        }

function createPlatform(x, y, z, w, h, d, color, isGoal = false) {
            const geo = new THREE.BoxGeometry(w, h, d);
            const mat = new THREE.MeshPhongMaterial({ color: color });
            const mesh = new THREE.Mesh(geo, mat);
            mesh.position.set(x, y, z);
            mesh.isGoal = isGoal;
            scene.add(mesh);
            platforms.push(mesh);
        }

function onKey(code, isPressed) {
            if (code === 'KeyW') moveForward = isPressed;
            if (code === 'KeyS') moveBackward = isPressed;
            if (code === 'KeyA') moveLeft = isPressed;
            if (code === 'KeyD') moveRight = isPressed;
            if (code === 'Space' && isPressed && canJump) {
                velocity.y += 0.25;
                canJump = false;
            }
            if (code === 'KeyR') resetPlayer();
        }

function resetPlayer() {
            player.position.set(0, 5, 0);
            velocity.set(0, 0, 0);
        }

function onWindowResize() {
            camera.aspect = window.innerWidth / window.innerHeight;
            camera.updateProjectionMatrix();
            renderer.setSize(window.innerWidth, window.innerHeight);
        }

function animate() {
            requestAnimationFrame(animate);
            if (!gameActive) return;

// Timer
            document.getElementById('timer').innerText = `Time: ${((Date.now() - startTime)/1000).toFixed(1)}s`;

// Movement Logic
            const delta = 0.1;
            velocity.x -= velocity.x * 10.0 * delta;
            velocity.z -= velocity.z * 10.0 * delta;
            velocity.y -= 0.01; // Gravity

direction.z = Number(moveForward) - Number(moveBackward);
            direction.x = Number(moveRight) - Number(moveLeft);
            direction.normalize();

if (moveForward || moveBackward) velocity.z -= direction.z * 0.12;
            if (moveLeft || moveRight) velocity.x -= direction.x * 0.12;

player.position.x += velocity.x;
            player.position.y += velocity.y;
            player.position.z += velocity.z;

// Collision Detection (Simple)
            canJump = false;
            platforms.forEach(p => {
                const pBox = new THREE.Box3().setFromObject(p);
                const playerBox = new THREE.Box3().setFromObject(player);

if (playerBox.intersectsBox(pBox)) {
                    if (player.position.y > p.position.y) {
                        player.position.y = p.position.y + 1.5;
                        velocity.y = 0;
                        canJump = true;
                        
                        if (p.isGoal) {
                            gameActive = false;
                            document.getElementById('win-screen').style.display = 'block';
                            document.getElementById('final-time').innerText = `Finished in ${((Date.now() - startTime)/1000).toFixed(2)} seconds!`;
                        }
                    }
                }
            });

// Fall off map
            if (player.position.y < -10) resetPlayer();

// Camera follow
            camera.position.set(player.position.x, player.position.y + 5, player.position.z + 12);
            camera.lookAt(player.position);

renderer.render(scene, camera);
        }
    </script>
</body>
</html>

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3D Browser Obby Game with Three.js

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