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Script

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<!DOCTYPE html>
<html>
<head>
    <title>Hill Climb JS</title>
    <style>
        body { margin: 0; overflow: hidden; background: #87CEEB; font-family: sans-serif; }
        canvas { display: block; }
        #ui { position: absolute; top: 20px; left: 20px; color: white; text-shadow: 2px 2px 4px #000; pointer-events: none; }
    </style>
</head>
<body>
    <div id="ui">
        <h1>Hill Climb JS</h1>
        <p>Hold <b>SPACE</b> or <b>CLICK</b> to Accelerate</p>
    </div>
    <canvas id="gameCanvas"></canvas>

<script>
const canvas = document.getElementById('gameCanvas');
const ctx = canvas.getContext('2d');

canvas.width = window.innerWidth;
canvas.height = window.innerHeight;

// --- Game Settings ---
let speed = 0;
let accel = 0;
let pos = 0; // Horizontal scroll position
const gravity = 0.15;
const friction = 0.98;

// --- Terrain Generation ---
const points = [];
let nextPoint = 0;

function generateTerrain() {
    while (points.length < 200) {
        const x = nextPoint;
        // Using sine waves to create "curved" hills
        const y = (canvas.height * 0.7) + 
                  Math.sin(nextPoint * 0.01) * 50 + 
                  Math.sin(nextPoint * 0.005) * 100;
        
        // Randomly decide to place a tree
        const hasTree = Math.random() > 0.95 && nextPoint > 500;
        
        points.push({ x, y, hasTree });
        nextPoint += 20;
    }
}

// --- Player Object ---
const player = {
    x: 150,
    y: 0,
    vY: 0,
    angle: 0,
    wheelRot: 0
};

// --- Input Handling ---
let isAccelerating = false;
window.addEventListener('keydown', (e) => { if (e.code === 'Space') isAccelerating = true; });
window.addEventListener('keyup', (e) => { if (e.code === 'Space') isAccelerating = false; });
window.addEventListener('mousedown', () => isAccelerating = true);
window.addEventListener('mouseup', () => isAccelerating = false);

function drawTree(x, y) {
    ctx.fillStyle = '#644117'; // Trunk
    ctx.fillRect(x - 5, y - 40, 10, 40);
    ctx.fillStyle = '#0B5345'; // Leaves
    ctx.beginPath();
    ctx.arc(x, y - 50, 25, 0, Math.PI * 2);
    ctx.fill();
}

function update() {
    generateTerrain();

    // Physics logic
    if (isAccelerating) accel += 0.2;
    else accel *= 0.9;
    
    speed = (speed + accel) * friction;
    if (speed < 0) speed = 0;
    pos += speed;

    // Find current ground height
    const currentPoint = points.find(p => p.x >= pos + player.x);
    const groundY = currentPoint ? currentPoint.y : canvas.height;

    // Simple gravity and collision
    if (player.y < groundY - 20) {
        player.vY += gravity;
    } else {
        player.vY = 0;
        player.y = groundY - 20;
        // Adjust angle based on hill slope
        const nextP = points.find(p => p.x >= pos + player.x + 20);
        if (nextP) {
            player.angle = Math.atan2(nextP.y - currentPoint.y, 20);
        }
    }
    player.y += player.vY;
    player.wheelRot += speed * 0.1;
}

function draw() {
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    // Draw Terrain & Trees
    ctx.beginPath();
    ctx.moveTo(0, canvas.height);
    ctx.fillStyle = '#228B22';
    
    for (let i = 0; i < points.length; i++) {
        const p = points[i];
        const screenX = p.x - pos;
        
        if (screenX < -50) continue; 
        if (screenX > canvas.width + 50) break;

        ctx.lineTo(screenX, p.y);
        if (p.hasTree) drawTree(screenX, p.y);
    }
    
    ctx.lineTo(canvas.width, canvas.height);
    ctx.fill();

    // Draw Car
    ctx.save();
    ctx.translate(player.x, player.y);
    ctx.rotate(player.angle);

    // Car Body
    ctx.fillStyle = '#E74C3C';
    ctx.fillRect(-25, -15, 50, 20);
    ctx.fillStyle = '#3498DB'; // Window
    ctx.fillRect(0, -12, 15, 8);

    // Wheels
    const drawWheel = (wx) => {
        ctx.save();
        ctx.translate(wx, 5);
        ctx.rotate(player.wheelRot);
        ctx.fillStyle = '#333';
        ctx.beginPath();
        ctx.arc(0, 0, 8, 0, Math.PI * 2);
        ctx.fill();
        ctx.strokeStyle = 'white';
        ctx.moveTo(0, 0); ctx.lineTo(8, 0); ctx.stroke();
        ctx.restore();
    };
    drawWheel(-15);
    drawWheel(15);

    ctx.restore();

    requestAnimationFrame(() => {
        update();
        draw();
    });
}

// Start
generateTerrain();
draw();
</script>
</body>
</html>

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