Sure! Here's a simple battle royale game implemented as a single HTML file using JavaScript and enclosed in script tags:
Battle Royale Game
This code sets up a basic battle royale game where the player is represented by a rectangular icon on a canvas. The player can move their icon by dragging their finger across the canvas on a smartphone. The code handles touch events to update the player's position and redraw the canvas accordingly.
You can customize the game further by adding other elements like enemies, weapons, or obstacles. You can also enhance the graphics by using pictograms instead of basic rectangles.
Please note that this is a very simple implementation to give you a starting point. You can extend and modify the code further depending on your specific game requirements and design choices.