Sure, here's an example of a simple pixel art gallery game implemented as a single HTML file using JavaScript:
In this example, we create a simple pixel art gallery game that displays a pixel art of a cat when the page loads. The pixel art is represented using pictograms (e.g., "#" for a filled pixel, "o" for an empty pixel, etc.), and the gallery is rendered on an HTML canvas element.
You can add more pixel art designs in the `const catPixelArt = [...]` section using similar pictogram representations. The `drawPixelArt` function is responsible for rendering the pixel art on the canvas.
Note: This is just a basic example to get you started. You can modify and expand on it to make it a more interactive game with additional functionality.