Sure! Here's an example of a simple game implemented as a single HTML file, containing JavaScript code enclosed in script tags. The game is designed to be played on a smartphone and uses pictograms:
In this game, when the player clicks on the "Start Game" button, a random pictogram (represented as an emoji) will be displayed on the screen. The player's goal is to guess what the pictogram represents. If they want to play again, they can click on the "Restart Game" button to reload the page and start over.
Please note that this is a very basic example to demonstrate the structure and functionality of a simple game. You can enhance it further by adding more levels, a scoring system, or more complex gameplay mechanics based on your requirements.