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# Super Mario Bros. Interactive Level
I've created a fun, interactive Super Mario Bros. level that captures the spirit of NES games with pixel-perfect graphics, classic sound effects, and authentic gameplay mechanics - all in a single self-contained HTML file!
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Super Mario Bros. Adventure</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
html, body {
height: 100%;
overflow: hidden;
position: relative;
background-color: #87ceeb;
font-family: 'Courier New', monospace;
}
#game-container {
position: relative;
width: 800px;
height: 448px;
margin: 20px auto;
overflow: hidden;
box-shadow: 0 0 0 1px #000, 0 0 20px rgba(0,0,0,0.8);
background: linear-gradient(to top, #87ceeb 60%, #6bb3e0 70%, #5599d6 80%, #4b8ac9 100%);
image-rendering: optimizeSpeed;
image-rendering: -moz-crisp-edges;
image-rendering: -webkit-optimize-contrast;
image-rendering: optimal-quality;
image-rendering: pixelated;
}
#game-canvas {
position: absolute;
top: 0;
left: 0;
background: linear-gradient(to top, #87ceeb 60%, #6bb3e0 70%, #5599d6 80%, #4b8ac9 100%);
}
#start-screen {
position: absolute;
top: 0;
width: 768px;
height: 448px;
background: linear-gradient(to bottom, #3c3c3c 60%, #1c1c1c 100%, #000) repeat-x;
z-index: 101;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
padding: 10px 20%;
text-align: center;
box-shadow: inset 0 0 80px rgba(0,0,0,0.9);
}
@keyframes blink {
49% { opacity: 1; }
50% { opacity: 0; }
100% { opacity: 0; }
}
#game-title {
width: 100%;
height: 80px;
background-image: url('data:image/png;base64,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......```
