Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript, designed for smartphone operation and utilizing pictograms:
In this game, there are four pictograms displayed on the screen. When the player taps/clicks on a pictogram, their score increases by 1, and the updated score is displayed. The pictograms move randomly within the game area every second.
Please note that this is a basic example and can be further enhanced with additional game mechanics, levels, timers, and other features depending on the desired game experience.