Here's an example of a simple game implemented as a single HTML file using JavaScript, incorporating pictograms and smartphone operation:
In this game, you control a cat represented by an orange circle using touch events on a smartphone. The cat's goal is to eat the turds (brown circles) scattered on the canvas. The game keeps track of your score, which increments each time a turd is successfully eaten.
Please note that using turds as game elements may not be suitable for all audiences, so it's important to consider appropriate content when designing a game.