Sure! Here's a simple 5v5 game implemented as a single HTML file using JavaScript. It can be played on a smartphone and uses pictograms for visuals.
Please note that this is a simplified example and may not have all the features of a complex game. You can build upon this code to add more functionality and enhance the gameplay as per your requirements.
To play the game, simply open the HTML file in a web browser on your smartphone. The game will prompt you to select a team by tapping on the "Team 1" or "Team 2" buttons. After selecting a team, the game will display the outcome with the winning team.