Sure! Here's a simple game implemented as a single HTML file using JavaScript:
In this game, a random pictogram (represented by emoji characters) is displayed on the screen. The objective is simply to click on the pictogram. Once the user clicks on it, an alert message is shown indicating that the game is over. The game can be replayed by refreshing the page.
Note: This is a very basic game, and you can modify and enhance it according to your own preferences and requirements.