Sure, here's an example of a simple battle royale game implemented as a single HTML file, enclosed in script tags and written in JavaScript:
block
ai
sphere
sphere
Battle Royale Game
In this game, you control the player's movement using the arrow keys on your smartphone's keyboard. The objective is to avoid colliding with the enemies (represented by blue squares) on the game board. If a collision occurs, a "Game Over" message will be displayed, and you can reload the page to start a new game.
Please note that this is just a basic example to showcase the concept. You can further enhance the game by adding more features such as scoring, shooting mechanics, additional levels, and more intricate gameplay logic.