Sure! Here's an example of a simple game where you have to dodge lasers by moving a character using smartphone operation:
To play the game, open any text editor, create a new file, copy the above code into it, and save it with a ".html" extension (for example, "game.html"). Then, you can open the file in any web browser on your smartphone and play the game by moving your device to dodge the laser while trying to achieve a high score.