Sure! Here's an example of a simple game implementation using JavaScript that can be played on a smartphone. It displays a clock and the objective is to stop the clock at the exact moment when the seconds hand points to the 12 o'clock position.
When you open this HTML file on a web browser or a smartphone, it will display a clock with three hands (hour, minute, and second). The clock hands will continuously move, and your objective is to stop the second hand exactly when it points to the 12 o'clock position.
Once you stop the clock, an alert message will appear congratulating you if you succeeded or alerting you that you missed if the second hand did not stop at 12 o'clock.
Please note that this is a basic example to demonstrate the game mechanics. You can customize the styling and enhance the game features as per your requirements.