Sure! Here's an example of a simple game called "Among Us Poop Version" implemented as a single HTML file using JavaScript:
This game utilizes touch controls to move the player, represented by a red square. You can move the player by touching and dragging on the canvas area. The canvas size is set to 400x300 pixels, but you can adjust it to fit your preferences.
Note that this is a very basic example and can be expanded upon to create a proper game with various features, levels, and challenges.