Sure, here's an example of a simple game implemented as a single HTML file using JavaScript and enclosed in script tags. The game is played on a smartphone and uses pictograms.
Escape from the Forest
In this game, the player starts trapped in a forest and needs to find a way to escape. Pictograms representing different forest elements are displayed on the screen. The player can click on any of the pictograms, and when they do, a congratulatory message is displayed indicating that they have escaped from the forest.
Note: The game can be expanded and modified according to your requirements and preferences.