Here's an example of a simple game where you control a green circle to dodge blue circles that can be shot left or right. The game is designed for smartphone operation and uses pictograms. The implementation is done in a single HTML file enclosed in script tags:
To play the game, save the above code in a `.html` file and open it in a web browser. You can control the green circle by tapping on the left area of the screen to move it left and on the right area to move it right. The blue circles will appear from the top and move across the screen randomly shooting left or right. Your goal is to dodge these blue circles and survive as long as possible.