Sure, here's an example of a simple game implemented in a single HTML file using JavaScript and enclosed in script tags. The game is designed for smartphone operation and uses pictograms.
In this game, the player's objective is to touch the cat pictogram to score points, while avoiding touching the dog pictogram. The game loop continuously redraws the canvas and updates the game state. When the player touches a pictogram, the corresponding action is performed, and if the player touches the dog, the game ends. The score is displayed on the canvas. The images used for the pictograms should be provided as separate files ("emozi_all/game.png" and "emozi_all/dog.png" in this example).