Sure! Here's an example of a simple game implemented as a single HTML file, written in JavaScript with the game logic enclosed in script tags. This game assumes smartphone operation and incorporates pictograms where possible:
This is a simple game where you can control a player character using touch input on a smartphone. The player character is represented by a blue square, and you can move it around the game canvas by dragging your finger on the screen. The game loop continuously updates and redraws the player on the canvas.
Feel free to modify and expand upon this example to create your own game!