Sure! Here's a simple game where you have to type "lol" 21 times. When you complete the task, a message will be displayed congratulating you on finishing the game. The game will be implemented as a single HTML file with JavaScript code enclosed in script tags:
To play the game, open a text editor, copy and paste the above code into a new file, and save it with a `.html` extension (e.g., `typing_game.html`). Then, open the file in a web browser on your smartphone. You will see a prompt asking you to type "lol" 21 times. As you type, the input will be checked, and once you reach the goal of typing it 21 times, a message will appear congratulating you on completing the game.
Note: Pictograms are not used in this implementation, but you can enhance the visuals by adding appropriate images or customizing the CSS styles as per your preference.