Sure! Here's an example of a simple game implemented in a single HTML file using JavaScript. It's a basic version of a game similar to Geometry Dash, specially designed for smartphone operation and using pictograms. Please note that this is a simplified version and not a complete game.
This HTML file contains the implementation of a basic version of the game. The player is represented by a walking pictogram and needs to avoid obstacles represented by square pictograms. The player can jump by pressing the spacebar. The game runs until the player collides with an obstacle, at which point a game over message is displayed.
Please note that this is just a simple example to give you an idea of how the game can be implemented. A complete and polished game like Geometry Dash would require much more sophisticated code and additional features.