Creating a Mario game involves a significant amount of code and resources, making it too extensive to provide in a single response. However, I can give you a simple example using HTML5 and JavaScript to create a basic Mario-like game. Please note that this is a very basic implementation and doesn't cover all the features of a full-fledged Mario game.

```html
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Mario Game</title>
  <style>
    body {
      margin: 0;
      overflow: hidden;
    }
    canvas {
      display: block;
    }
  </style>
</head>
<body>

<canvas id="marioCanvas" width="800" height="400"></canvas>

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

  // Mario properties
  const mario = {
    x: 50,
    y: canvas.height - 30,
    width: 30,
    height: 30,
    color: "red",
    speed: 5,
    jumping: false,
    jumpHeight: 100,
  };

  // Gravity
  const gravity = 1;

  // Controls
  const keys = {};

  window.addEventListener("keydown", (e) => {
    keys[e.code] = true;
  });

  window.addEventListener("keyup", (e) => {
    keys[e.code] = false;
  });

  function update() {
    // Move Mario
    if (keys["ArrowRight"] && mario.x < canvas.width - mario.width) {
      mario.x += mario.speed;
    }
    if (keys["ArrowLeft"] && mario.x > 0) {
      mario.x -= mario.speed;
    }

    // Jump
    if (keys["Space"] && !mario.jumping) {
      mario.jumping = true;
      jump();
    }

    // Apply gravity
    if (mario.y < canvas.height - mario.height) {
      mario.y += gravity;
    } else {
      mario.y = canvas.height - mario.height;
      mario.jumping = false;
    }

    // Clear canvas
    ctx.clearRect(0, 0, canvas.width, canvas.height);

    // Draw Mario
    ctx.fillStyle = mario.color;
    ctx.fillRect(mario.x, mario.y, mario.width, mario.height);

    requestAnimationFrame(update);
  }

  function jump() {
    let jumpCount = 0;
    function jumpLoop() {
      if (jumpCount < mario.jumpHeight) {
        mario.y -= 2;
        jumpCount += 2;
        requestAnimationFrame(jumpLoop);
      } else {
        requestAnimationFrame(fallLoop);
      }
    }

    function fallLoop() {
      if (mario.y < canvas.height - mario.height) {
        mario.y += 2;
        requestAnimationFrame(fallLoop);
      } else {
        mario.y = canvas.height - mario.height;
        mario.jumping = false;
      }
    }

    jumpLoop();
  }

  update();
</script>

</body>
</html>
```

Copy and paste this code into an HTML file, then open it in a web browser. It provides basic controls for moving Mario left and right and jumping. This is a simple example, and a complete Mario game would involve more features, levels, and assets. If you want a more advanced game, you might consider using a game development framework or engine like Phaser.js or Unity.

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About HTML

HTML(Hyper Text Markup language) is the standard markup language for Web pages, was created by Berners-Lee in the year 1991. Almost every web page over internet might be using HTML.

Syntax help

Fundamentals

  • Any HTML document must start with document declaration <!DOCTYPE html>
  • HTML documents begin with <html> and ends with </html>
  • Headings are defined with <h1> to <h6> where <h1> is the highest important heading and <h6> is the least important sub-heading.
  • Paragrahs are defined in <p>..</p> tag.
  • Links are defined in <a> tag.

    Example:

    <a href="https://onecompiler.com/html">HTML online compiler</a>
  • Images are defined in <img> tag, where src attribute consists of image name.
  • Buttons are defined in <button>..</button> tag
  • Lists are defined in <ul> for unordered/bullet list and <ol> for ordered/number list, and the list items are defined in <li>.

HTML Elements and Attributes

  • HTML element is everything present from start tag to end tag.
  • The text present between start and end tag is called HTML element content.
  • Anything can be a tagname but it's preferred to put the meaningful title to the content present as tag name.
  • Do not forget the end tag.
  • Elements with no content are called empty elements.
  • Elements can have attributes which provides additional information about the element.
  • In the below example, href is an attribute and a is the tag name.

    Example:

    <a href="https://onecompiler.com/html">HTML online compiler</a>

CSS

CSS(cascading style sheets) describes how HTML elements will look on the web page like color, font-style, font-size, background color etc.

Example:

Below is a sample style sheet which displays heading in green and in Candara font with padding space of 25px.

body{
  padding: 25px;
}
.title {
	color: #228B22;
	font-family: Candara;
}

HTML Tables

  • HTML Tables are defined in <table> tag.
  • Table row should be defined in <tr> tag
  • Table header should be defined in <th> tag
  • Table data should be defined in <td> tag
  • Table caption should be defined in <caption> tag

HTML-Javascript

  • Javascript is used in HTML pages to make them more interactive.
  • <script> is the tag used to write scripts in HTML
  • You can either reference a external script or write script code in this tag.

Example

<script src="script.js"></script>