Here's an example of a simple game implemented as a single HTML file with JavaScript code, using pictograms as visuals. In this game, you control a character who must avoid enemies and stay alive on a long platform with trees.
This game uses the canvas element to draw the game graphics. The player can control their character using the space bar to jump. The game checks for collisions with trees and enemies, and if a collision occurs, the game is over.
Please note that this is just a basic example of a game implementation. You can customize and add more features to the game as per your requirements.