Here's an example of how you can implement a simple game where a man is running and collecting coins in a 3D world. The game will be playable in a single HTML file, using JavaScript and pictograms:
This code sets up a simple game where the player character can move horizontally to collect coins represented as yellow circles. The player can control the character's movement using the arrow keys. The game loop continuously updates the game state and renders the player and coins on the canvas.
Please note that this is a basic implementation to give you an idea of how the game could work. You can customize and enhance it further to fit your specific requirements.