Sure! Here's a simple game implemented as a single HTML file using JavaScript, enclosed in script tags:
This game involves controlling a player object using touch input on a smartphone. The goal is to avoid the player from reaching the top of the screen. The player is represented by a square pictogram ("rect" in this case). The score increases with each loop iteration, and when the player reaches the top of the screen, a game over screen is displayed with the final score.
Please note that this is a simple example to showcase how a game can be implemented using HTML and JavaScript. You can customize and enhance it further based on your requirements.