Sure! Here's an example of a simple game implemented as a single HTML file using JavaScript. This game is a cooperative multiplayer game where players need to work together to stack blocks using pictograms on their smartphones.
This game creates a canvas element where the gameplay occurs. Players can tap/click on the screen to make the block character jump. The objective is to stack the blocks as high as possible by timing the jumps correctly.
This is just a basic example to get you started. You can further enhance this game by adding scoring, different levels, multiplayer functionality, and stylized pictograms according to your preferences.