Sure! Here's an example of a single HTML file that implements a game where a random emoji moves around in a box, getting faster every time it hits a wall or corner. This implementation uses JavaScript and is enclosed in script tags:
😀
In this game, an emoji (represented by the
😀 pictogram) moves around inside a box. The `moveEmoji()` function is responsible for updating the emoji's position, checking for collisions with walls or corners, and increasing the emoji's speed. The game loop is initiated using `requestAnimationFrame()`.
Please note that this is a basic example and can be further customized or enhanced based on your specific requirements.