Sure! Here's an example of a simple game implemented as a single HTML file with JavaScript enclosed in script tags. This game assumes smartphone operation and uses pictograms for visual representation:
This example sets up a canvas and draws a red square pictogram as the player. The player can be controlled by touching the screen and moving the square to the touched position. The game loop continuously updates and renders the game state. You can add more game logic and features to this basic template as per your requirements.