Sure! Here's a basic implementation of a game where you can create your own custom Mario levels using pictograms.
To run this game, create a new HTML file and save it with a .html extension. Place this code inside the file and open it in a web browser. You'll see a canvas where you can click to create your custom Mario levels using the provided pictograms (mario.png, coin.png, goomba.png, etc.). As you click on the canvas, the level will update and redraw accordingly. You can add more pictogram options by including additional `<img>` tags in the pictogram selector section and updating the `setPictogram` function accordingly.