Sure! Here's an example of a simple game implementation called "Snail Mobile":
To play the game:
1. Create a new HTML file and copy the above code into it.
2. Save the HTML file with a .html extension (e.g., snail-mobile.html).
3. Open the HTML file on a smartphone using a web browser.
4. You will see a game window with a moving snail.
5. Tap/click the snail to catch it.
6. A message will appear saying "You caught the snail! Game over."
7. You can restart the game by tapping/clicking "OK" in the alert box.
Feel free to customize the game further as per your requirements or add additional features.