Sure, here's an example of how you can create a simple game called "Life the Game" implemented as a single HTML file using JavaScript:
Life the Game
Click on the icons to increase your "Life" level!
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In this game, the goal is to click on the heart icons (pictograms) to increase the "Life" level. The maximum life level is set to 5. Once the player reaches the maximum level, an alert message is displayed to congratulate them. The game is designed to be played on a smartphone.
Note that this is a very basic example just to demonstrate the concept. You can enhance and customize the game further according to your preferences.