Here's an example of a simple game implemented as a single HTML file, using JavaScript within script tags:
This code sets up a simple game where you can tap/click and draw lines on a canvas. You can choose from pre-defined drawings (represented as pictograms) and draw lines freely on the canvas. The lines are drawn as you move your finger/mouse while tapping/clicking, and they can be reset by releasing the tap/click.
Please note that you would need to replace the `emozi_cat.png` and `emozi_himawari.png` with the actual paths to the corresponding image files for the drawings you want to include in your game. Also, feel free to modify the code and add more drawings as needed.
I hope this serves as a starting point for your game!