Sure, here's an example of a simple game implemented as a single HTML file using JavaScript and enclosed in script tags:
Pictogram Game
In this game, a random pictogram is selected from an array of available pictograms, and the player's objective is to click on the correct pictogram within a set of displayed options. When a pictogram is clicked, the game checks if it matches the selected pictogram. If it matches, the score is incremented and an alert is shown with the current score. If it doesn't match, an alert is shown indicating the incorrect selection. The game then restarts by selecting a new pictogram.
Note: This is a basic example, and you can customize it further based on your needs, such as adding more levels, a timer, or additional features.