Sure! Here's an example of a simple Battle Royale game implemented as a single HTML file using JavaScript. The game can be played on a smartphone and uses pictograms for visuals.
To play the game, simply copy the above code into a new file with a `.html` extension and open it in a web browser. The game board will be displayed, and players can take turns by tapping on the cells. The first player to get three of their symbols in a row, column, or diagonal wins the game. If all cells are filled and no winning condition is met, it will result in a draw.