To make it into a game, the provided code sets up a basic HTML5 canvas and displays a picture of Mario running across the screen. The game loop continuously updates Mario's position on the canvas, making it appear as if he is running. The mario.png file is assumed to be in the same directory as the HTML file.
Please note that this is a simple example to demonstrate the concept of a game loop using HTML5 canvas and JavaScript. Actual game development often involves more complex logic, collision detection, user input handling, and various game elements.