Sure! Here's an example of a simple drawing game implemented as a single HTML file, using JavaScript:
This game creates a drawing canvas where users can draw on the screen using their mouse or touchscreen. The canvas is enclosed in a `canvas` element with the id "canvas". Drawing starts when the user clicks or touches the canvas, and stops when the user releases the mouse or touch. The drawing is implemented using the HTML5 canvas and the 2D drawing context.
Additionally, a "Clear" button is added to allow users to clear the canvas at any time. When the button is clicked, the `clearCanvas` function is called, which clears the entire canvas.
Feel free to modify and enhance the code to suit your specific game requirements.