Sure, here's an example of an interactive game where you can tap a ball to relieve stress. The ball will bounce around the screen whenever you tap it. To make it smartphone-friendly, we'll use touch events instead of mouse events.
To use the program, simply copy the code above and save it as a `.html` file. When you open the file in a web browser, you'll see a red ball bouncing around the screen. Tap the ball on your smartphone's screen to reverse its velocity and make it bounce in a different direction, giving you a simple stress relief game experience.