Sure! Here's a simple game called "Bubble Burst" implemented as a single HTML file with JavaScript enclosed in script tags:
In this game, you will see a canvas element displaying a blue bubble. When you tap on the bubble, it will burst, and a new random bubble will appear at a different location. The score will increment each time you burst a bubble. The game starts when you tap on the canvas for the first time. The game runs on smartphones and uses touch events to interact with the bubbles.
Feel free to adjust the code or add more features to enhance the game further!